They claimed        a cure for the disease, but this hasn’t been proved.

A．having discovered                                       B．discovering

C．to have discovered                                      D．to discover

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：2011-2012學(xué)年福建省泉州一中高二下學(xué)期期中考試英語(yǔ)試卷（帶解析） 題型：閱讀理解

Due to climate change, Arctic ice is breaking up earlier in the spring, and its area is decreasing. This is creating problems for polar bears that make their homes off northern Alaska and in Hudson Bay.
Polar bears off Alaska normally hunt and raise their young on ice sheets that float on the ocean. But as the ice has melted, the polar bears have been forced to spend more time on land. There, they have begun to frequent beaches, feeding on the remains of whales caught by native hunters. For polar bears, this food is less nutritious than seals that they normally catch on ice sheets. The shrinking（減少） ice has also forced more polar bears into the ocean. In the past, they only had to swim short distances between ice sheets. But as the ice has shrunk, polar bears have been forced to swim longer and longer distances in the open ocean. This poses a severe danger during rough weather, and an increasing number of drowned polar bears have been observed.
In Hudson Bay, the ice breaks up three weeks earlier in the spring now than it did 20 years ago. Polar bears on Hudson Bay fast（絕食） during the summer, waiting for ice to form in the fall to hunt. Every year, the summer gets longer, and the bears get skinnier. Over the past 25 years, the average weight of the female bears has dropped 68 kg. This loss affects their ability to reproduce, and already the number of births has dropped 15 percent. Unless the bears can learn to survive these climate changes, these giants of the ice may one day disappear.
【小題1】What is Arctic ice doing earlier each year?

A．It’s freezing.B．It’s hardening.
C．It’s melting.D．It’s expanding.
【小題2】What is true of polar bears that are spending more time on land in Alaska?
A．Their young are dying.
B．Their diet is changing.
C．Their health is improving.
D．Their families are growing.
【小題3】What do polar bears in Hudson Bay do during the summer?
A．They claim territory(地域).B．They protect mates.
C．They hunt animals.D．They stop feeding
【小題4】In which publication would you most likely find this passage?
A．Medical NewsB．Society TodayC．Wildlife JournalD．Design Magazine

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2011屆河北省正定中學(xué)高三第一次月考英語(yǔ)卷 題型：閱讀理解

Are you tired of looking for love in all the usual places? Nowadays, millions of lonely singles are now going online instead．The World Wide Web is quickly becoming the world’s most popular matchmaker．With so many singles online, dozens of dating sites like Yahoo Personals and Match．com are helping singles find that special someone．Around the world, from America to China, love is now very much online．
Singles are flocking to the Internet mainly because their busy lifestyles leave them little time to look for a significant other．Using dating sites is quick and convenient．They can “meet” a lot more people online than they could by hanging out at a club．Besides , many singles say the regular dating scene has just led them from one bad experience to another and are ready to try something else．They also appreciate the first distance of online dating, which allows them to hide themselves until they are ready to meet someone face to face．Dating sites also make it easy to avoid someone you are not interested in．In the real world, however, ignoring someone you don’t like can be awkward．
Despite all the advantages, online dating also presents its own set of problems．People aren’t always who they claim to be in their online profiles．For instance, someone who tells you he is “handsome, successful and single” might turn out to be homely, unemployed and married．Safety is another concern．You are just as likely to find a criminal online as you are Mr or Miss Right．
Even so, supporters of online dating see things in a positive way．In their opinion, singles can safely play the online dating game with a little common sense．Online dating experts recommend following a few safety tips:
Guard your personal information．Never give out your personal information online．This includes your last name, phone number, home address and place of work．
Watch for red flags．Do any of the people you are chatting with make disrespectful comments? Do they try to control you? Do they give false information about themselves? If so, forget them!
Meet in a safe place．When meeting someone in person, choose a public location with other people around．
Following these tips and you might be able to find the person of your dreams．
【小題1】According to the passage, many lonely singles don’t appreciate the regular dating scene because it is ___．

A．unpopular　　　B．troublesomeC．convenient　D．forgettable
【小題2】This passage is mainly about　　．
A．getting tired of falling in love in a usual way
B．people with false information on the Internet
C．new technology to find love through the Interent
D．web sites such as Yahoo Personals and Match．com
【小題3】Which of the following is NOT a suitable place for meeting someone you get to know through the Internet for the first time according to the text?
A．At his/her house．　　　　　B．At a museum．
C．At McDonald’s．　　D．At a bookstore．
【小題4】From this passage ,we can infer that　　．
A．there are mostly homely and unemployed people online
B．the police had better find criminals online
C．we can find love only through the dating sites
D．following safety tips ensure a safe online dating experience

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2016屆安徽省高一上學(xué)期期末考試英語(yǔ)試卷（解析版） 題型：其他題

Are you tired of looking for love in all the usual places? Nowadays, millions of lonely singles are now going online instead. The World Wide Web is quickly becoming the world’s most popular matchmaker. With so many singles online, dozens of dating sites like Yahoo Personals and Match. com are helping singles find that special someone. Around the world, from America to China, love is now very much online.

Singles are flocking to the Internet mainly because their busy lifestyles leave them little time to look for a significant other. Using dating sites is quick and convenient. They can “meet” a lot more people online than they could by hanging out at a club. Besides, many singles say the regular dating scene has just led them from one bad experience to another and are ready to try something else. They also appreciate the first distance of online dating, which allows them to hide themselves until they are ready to meet someone face to face. Dating sites also make it easy to avoid someone you are not interested in. In the real world, however, ignoring some one you don’t like can be embarrassing.

Despite all the advantages, online dating also presents its own set of problems. People aren’t always who they claim to be in their online profiles. For instance, someone who tells you he is “ handsome, successful and single” might turn out to be homely, unemployed and married. Safety is another concern. You are just as likely to find a criminal online as you are Mr. or Miss Right.

Even so, supporters of online dating see things in a positive way. In their opinion, singles can safely play the online dating game with a little common sense. Online dating experts recommend following a few safety tips:

Guard you personal information. Never give out your personal information online. This includes your last name, phone number , home address and place of work.

Watch for red flags. Do any of the people your are chatting with make disrespectful comment? Do they try to control you? Do they give false information about themselves? If so, forget them!

Meet in a safe place. When meeting someone in person, choose a public location with other people around. Following these tips and you might be able to find the person of your dreams.

Title: Online dating

Phenomenon

Singles1.__________ to look for love online.

Comparisons between online dating sites and

2.__________ dating scene

They can “meet” more people than they could in the 3.__________world.

The 4.__________of online dating allows them to hide themselves until they are ready to meet someone face to face.

They can avoid someone they are not interested in.

Some people are5.__________ of the similar experiences.

You will feel 6.__________if you ignore someone you don’t like.

7.__________of online dating

Some of the information may be8.__________.

Another concern is safety.

Safety tips

Guard your personal information, 9.__________your last name, phone number, home address and place of work.

Chat with the people who are honest and 10.__________.

 

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2011湖北華師一附中荊州高三5月模擬考試英語(yǔ)試題 題型：單項(xiàng)填空

A firm from New Zealand has revealed a set of robotic legs which they claim will soon allow ________ wheelchair-bound people to walk again.

A. extremely         B. previously           C. actually             D. eventually

 

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2011年湖南省高三年級(jí)下學(xué)期期中考試英語(yǔ)試卷 題型：閱讀理解

A recent online poll (民意調(diào)查) asked kids what they hated most about school. “Classes are boring” came in first. “Too much homework” was a close second. Since all activities remain interesting for only so long, too much homework can lead to ennui. So, why are some kids getting homework overload? Teachers give two reasons. First, they say, the government now requires schools to meet higher-than-ever achievement goals for students. If students don’ t succeed, the school faces punishment. Second, many parents want their children to be able to get into the best colleges and universities. These parents believe homework is a way to ensure that students are learning as much as possible.

    People who favor homework argue that it can have many beneficial effects. They claim it can help students develop good study habits. Homework can help students recognize that learning can occur at home as well as at school. It can help develop their independent learning and responsible character traits(性格特征).

   But studies show that middle school students doing 60 to 90 minutes of homework a night are doing just as well in school as those doing more than 90 minutes. And homework can have negative effects. Homework can deny students access to leisure(休閑) activities that also teach important skills. For example, sports teams teach cooperation and leadership, in addition to helping kids stay physically active. Another problem with too much homework is that parents can get too involved. They can put too much pressure on their kids.

So what should be done? Good homework assignments in the proper amount will have positive effects. Too much homework, however, will have negative effects. The bottom line: Students in grades three through six should do no more than 30 to 60 minutes of homework each night.

1.The underline word “ennui” in Paragraph 2 can be replaced by “______” .

   A. relaxation      B. fancy          C. boredom            D. intelligence

2. According to Paragraph 1, the kids are given much homework because ________.

   A. schools are evaluated in terms of students’ achievement.

   B. the government doesn’t take the problem seriously

   C. it is a good way to improve the students’ ability

   D. time will be made full use of in this way

3.Those who are in favor of homework think that _______.

   A. homework helps students to succeed

   B. it’s good for kids to help each other in learning

   C. parents are a great help when kids do homework at home

   D. homework helps children to learn independently

4. Which of the following is NOT a negative effect of too much homework?

   A. Kids have little time to do leisure activities.

   B. There is a lack of sleeping time.

   C. The chances of learning other skills are lost.

   D. Kids are under pressure from their parents.

5. The author’s purpose in writing the passage is _______.

   A. to criticize the school teachers

   B. to attract public attention to kids’ study

   C. to offer more help to today’s kids

   D. to call for proper amounts of homework

 

查看答案和解析>>

同步練習(xí)冊(cè)答案