We cannot figure out _______ quite a number of insects, birds, and animals are dying out.?

A. that B. as C. why D. when?

C?


解析:

謂語動詞cannot figure out 意為“不能理解/明白”,其后的賓語從句應(yīng)該表示疑問,所以排除that。as意為“因為;當……時候”;when意為“當……時候”,均不合題意。故選C項。

練習冊系列答案
相關(guān)習題

科目:高中英語 來源:2012-2013學年吉林省吉林一中高一上學期期末考試英語試卷(帶解析) 題型:閱讀理解

In some countries in which there is very little rain at any time, the farmers have to irrigate their fields. Irrigation is easy enough if there is a great river near the crops, and if there is plenty of water in it. Canals carry the river water to the fields when necessary. In some seasons there may be too much water in the river, and the water may flood all the land near it. At other times the river water may not be enough for all the farmers, and then it will be difficult to irrigate the fields.
To prevent these difficulties, a dam may be built across the river. This will store water for dry seasons, and in wet seasons it will prevent the flooding of the land. A great lake will, no doubt, be formed behind the dam, and this may mean that houses and fields will be covered with water. Most people will accept that and will be ready to move to other places. Then the country can have the right amount of water at all times; more crops will be grown, there will be more food for everyone, and there will be no more floods.
Dams have been built for centuries in different parts of the world. Modern dame are usually built of concrete(混凝土)but earth dams were used in India and Sri Lanka about 2500 years ago. There was another across the River Tigris very long ago, and large numbers of irrigation canals were made in Iraq to irrigate the land. The Romans were great dam-builders and there was also a famous dam at Ma’ rubin Arabia.
We cannot use sea water for irrigation; the salt will not allow the crops to grow. Fresh water is always needed, and it is very difficult and costly to make fresh water from sea water. This is done in a few countries, but the fresh water is for drinking. There is not enough at present for irrigation. Perhaps a scientist will one day invent a cheaper way of producing fresh water from the sea.
【小題1】The first paragraph mainly talks about         .

A.the problems caused by river water
B.the necessity to irrigate the field
C.the water shortage in some countries
D.the canals carrying water to fields
【小題2】A dam is usually built         .
A.to cover the houses and fields
B.for people to have the right amount of water at all times
C.to grow crops better
D.to form a large lake
【小題3】The underlined word“that”means        .
A.a(chǎn) dam will be built across the river
B.a(chǎn) dam will store water for dry seasons
C.in wet seasons a dam will prevent the flooding of the land
D.houses and fields will be covered will water
【小題4】The third paragraph suggests that        .
A.modern dams are made of concrete
B.Romans once built many great dams
C.there was too much water in 1rap in the past
D.modern dams are better than early dams

查看答案和解析>>

科目:高中英語 來源:福建省廈門大學附屬科技中學2009-2010學年度高二第二學期期中考試英語試卷 題型:閱讀理解

.
第三部分:閱讀理解(共20小題,每小題2分,滿分40分)
閱讀下列短文,從每題所給的四個選項(A, B, C和D)中,選出最佳選項。
During an exhibition show the skills of disabled people, an armless man used his mouth and feet to repair a watch. He completed the task in just a few minutes at the show, which was held in Beijing last Saturday. Just imagine the tiny parts that make up a watch. You have to wonder how the disabled man developed such a skill.
It was reported that 28-year-old Wang Jianghai lost his arms in an accident when he was five and began learning to repair watches at the age of 17. He has repaired more than 10,000 watches in the past 11 years.
What strong self-confidence he must have to overcome the difficulties in getting this skill! What optimism he must have to face the unfairness of his hard life! And what strong determination he must have to go through the hardship in his struggle for a normal life! Such confidence, optimism and willpower are exactly the qualities many physically healthy people lack nowadays. Wang has set a good example for young people.
But today's youth seem to be more interested with their TV stars and pop singers but less interested in learning from the examples of working and studying hard to achieve higher goals. . That is undoubtedly the result of the influence of a changing social atmosphere. One must admit that there is a trend towards hedonism in our society. People are increasingly more concerned about material gains than about spiritual pursuits. While adults know they must work hard whatever way they choose to materialize the gains, the younger generation are more likely to seek ease and comforts of their senses.
This pleasure-seeking trend provides a huge market for the entertainment industry and the mass media. The media devote excessive too much coverage to anecdotes of pop and TV stars, which in turn fans wider and stronger enthusiasm for entertainment among the public, especially young people.
Ours is a developing country. Global competition in the growth of national strength presents a demand for China to be quicker in its development. We cannot afford to lose time. We need to make our economy more powerful. To meet this need, all of us should maintain our tradition of working hard and overcoming difficulties.
56. A particular mention made of Wang Jianghai’s story in the first two paragraphs _____.
A. serves as a description of the trend today  
B. serves as an introduction to the discussion
C. shows a disagreement of views    
D. show the popularity of the TV stars and pop singers
57. Which of the following is the reason for young people’s increasing interest in entertainment?
A. Young people are taught by adults to seek pleasure of senses.
B. Young people have given up our traditional value of hard working completely
C. Young people are not interested in learning from the examples of hard working at all.
D. Young people are far too much influenced by too much entertainment news in media.
58. The underlined word “hedonism” (paragraph 4) means “________”.
A. a material                                                 B. spiritual gains
C. thinking pleasure is the most important            D. amusement

查看答案和解析>>

科目:高中英語 來源:2013屆度遼寧省莊河六高高二第一次月考英語題 題型:閱讀理解

Why must we pay taxes? The answer is that the government needs money for many things, for example to pay its soldiers, sailors and airmen, to build roads, bridges, offices, schools, etc and to buy goods from abroad; and only the people of the country can supply the money.One of the most important taxes is income-tax which a person pays according to the amount of his income-tax.Whether he is a businessman, a doctor, a lawyer, a shopkeeper, a miner, or anything else.This is called a “direct” tax, because it is paid in money direct to the government.

Another tax is paid on goods such as watches, jewellery, new clothes, tobacco, wine, etc, when they are brought into a country, such a tax is paid as part of the price of these goods if they are later sold in shops.We call it “indirect” tax, because it is paid indirectly through the shopkeeper.

People usually complain about having to pay taxes, but they forget that the money is spent on the things that they and their families need.We need policemen to catch thieves, to see that men obey the laws, to direct traffic, etc, and they must be paid what they earn; children need education and there must be schools and teachers; we want our streets to be kept clean, and the wages of men who do this kind of work have to be paid.Above all, the country must always be ready to defend itself against attacking enemies, and we cannot have an army without paying for it.

Taxes, therefore, cannot be avoided.We buy our own food and clothes and pay for our own amusements, but there are several things that the State finds the money for, and that are necessary for us if our society is to continue.So we have no real cause to complain when we are asked to supply money to be spent for the good of ourselves and for our fellow-citizens.

1.Indirect tax means _______.

A.tax that one pays direct to the government

B.tax that is not paid directly to the government

C.tax that is paid as an extra amount added to the price of certain goods   

D.Both B and C

2.Which of the following is right?

A.Taxes are paid to the sellers.

B.Income-tax is an indirect tax.

C.The tax on new clothes is paid in money direct to the government.

D.Tax is amount of money that you have to pay to the government so that it can pay for public services.

3.People have no real reason to complain about having to pay taxes because _______.

A.some shopkeepers are very rich

B.they need money to buy goods from abroad

C.their children need education

D.the money is spent on the things that they and their families need

 

查看答案和解析>>

科目:高中英語 來源:20102011河南省高一下學期期末考試英語試題 題型:閱讀理解

People bury treasure to stop other people from taking it. They choose a quiet place, dig a deep hole and bury the treasure in it. Then they make a map of where the treasure is or write down other clues(線索)that will help them or someone else to find it again.

In Britain a few years ago, a writer wrote about some treasure that he had buried. He put clues in the story to help readers find it. Thousands of people hunted for the treasure. They dug holes all over Britain, hoping to find it.

One of the most popular adventure stories ever written is Robert Louis Stephenson's “Treasured Island”, an exciting story about a young boy, Jim Hawkins, who is captured by pirates (海盜) and later finds some buried treasure.

Then there is the true story about a man who had to travel overseas for a year. He did not trust banks, so he buried his life savings in a park. Then he went away. On his return, he went straight to the park. But the park was no longer there. In its place there was a huge building.

And then there was the man who buried his savings, all in bank notes, in a waterproof(防水的)bag. When he dug it up years later, there was nothing left. Worms and insects had eaten the bag and everything in it.

And of course, these are stories about people who bury things and either forget where they have buried them or lose the map.

Although it is true that people sometimes lose their money because a bank fails, banks are still the safest place to keep our savings and treasures.

1.

 People who bury treasure usually        .

A. do not trust banks              

B. have a little money .

C. want to live in a quiet place.      

D. expect to lose it

2.

 The writer in Britain        .

A. really had buried something.     

B. started a nationwide treasure hunt.

C. had lost his treasure and wanted people to help him find it.

D. caused trouble because people dug holes everywhere.

3.

. “Treasure Island”        .

A. is a story about pirates.          

B. is about the adventures of Jim Hawkins.

C. is the most popular story ever written.

D. is a well-known fairy tale.

4.

The man who buried his money in a park        .

A. thought his money was safer there than in a bank.

B. travelled on the sea for a year.     

C. got his life savings back again.

D. stayed away longer than he expected.

5.

From these stories we understand that        .

A. we cannot trust banks.           

B. we should not trust anyone.

C. a waterproof bag is not proof against worms and insects.

D. insects eat anything.

 

查看答案和解析>>

科目:高中英語 來源:20102011學年江西省南昌市高二下學期期中考試英語試題 題型:完型填空

完形填空(共20小題;每小題1.5分, 滿分30分)

It was a rainy day and I was riding on a bus downtown to go to work. I was_36_next to a man in a business suit and J paid little attention_37_ we both got off at the same stop and walked to the same news-stand to get a morning_38_.

The man running the stand was obviously having a_39_day. He was rude and unsmil­ing as we bought our papers,which only_40_ more gloom (郁悶) to my day. The business­man_41_my gloomy feeling and smiled brightly,_42_the news-stand owner for the paper and for being open on such a( n) _43_to make sure we were able to get our papers.

    As we_44_away,I asked this man why he was so_45_to the newsman when he didn't _46_his expression of thanks and friendliness. The businessman smiled at me and said,"Why would I let someone else _47_what I say and what I feel?"

    We then_48_to go to our own work places. To this day,I still don't know who that businessman was,or_49_he worked. He appeared briefly in my life and disappeared just as_50_. But I've never forgotten the words he said and his_51_which seemed like a ray of light on a gloomy day.

That was a good 25 years_52_,but the effect this had on my life has lasted. I_53_had a chance to thank him personally,but the way I look at life has changed _54_those words. I have learnt that we cannot control people and_55_that come to us, but we can always control our response to them. 

1. A. whispering       B. sitting      C. driving         D. weeping

2. A. since            B. after        C. unless          D. until

3. A. paper            B. suit         C. call            D. coffee

4. A. good             B. nervous      C. bad             D.long

5. A. provided         B. offered      C. added           D. returned

6. A. breathed         B. called       C. noticed         D. took

7. A. thanking         B. envying      C. asking          D. blaming

8. A. evening          B. afternoon    C. morning         D. midnight

9. A. turned           B. passed       C. drove           D.ran

10. A. cruel           B. serious      C. pleasant        D. rude

11.A. stick to         B. refer to     C. get used to     D. respond to

12.A. explain          B. understand   C. control         D. correct

13. A. attempted       B. sought       C. continued       D. separated

14. A. where           B. why          C. whether         D. how

15. A. gently          B. quickly      C. regularly       D. strangely

16.A. humor            B. smile        C. business        D. help

17. A. ago             B. before       C.later            D. after

18. A. often           B. seldom       C. once            D. never

19. A. in search of    B. in memoryof C. for the purpose of D. as a result of

20. A. situations   B. statements   C. possibilities    D. positions

 

查看答案和解析>>

同步練習冊答案