【題目】You can’t be sure of ________ you have at present; you cannot be sure of something _______ you might get in the future.

A. that; what B. what; / C. which; that D. /; that

【答案】B

【解析】

試題分析：考查賓語從句和定語從句。句意：你不能確信你現(xiàn)在擁有什么；你也不能確信你將來會擁有什么。第一空填what，用以引導賓語從句，用作介詞of的賓語，其中的what也在從句中用作動詞have的賓語; 第二空填that（可省略），用以引導定語從句，修飾先行詞something。故選B項。

練習冊系列答案
相關習題

科目：高中英語 來源： 題型：

【題目】根據(jù)短文內(nèi)容，從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項根據(jù)短文內(nèi)容.

Any car accident is frightening, but an accident in which your vehicle is thrown into the water, with you trapped inside, is absolutely(絕對地) terrifying.

【1】 . However, most deaths result from fear, without a plan or understanding what is happening to the car in the water. By adopting a brace(支撐) position, acting decisively and getting out fast, you can save yourself from a sinking vehicle.

Brace yourself for impact (撞擊力). As soon as you're aware that you're going off th e road and into a body of water, adopt a brace position. The impact could set off the airbag system in your vehicle, so you should place both hands on the steering wheel(方向盤) in the "ten and two" position.

Undo your seatbelt. 【2】 . Release the children, starting with the oldest first. Forget the cell phone call. Your car isn't going to wait for you to make the call.

【3】 . Leave the door alone at this stage and concentrate on the window. A car's electrical system should work for up to three minutes in water, so try the method of opening it electronically first. Many people don't think about the window as an escape choice either because of fear or misinformation about doors and sinking.

Break the window. If you aren't able to open the window, or it only opens halfway, you'll need to break it with an object or your foot. It may feel counter-intuitive (有悖常理的) to let water into the car. 【4】 .

Escape when the car has equalized. If it has reached the stage where the car has been filled with water and it has become balanced, you must move quickly and effectively to ensure your survival. 【5】 . While there is still air in the car, take slow, deep breaths and focus on what you're doing.

A. Open the window as soon as you hit the water.

B. This is the first thing to do, yet it often gets forgotten.

C. Surviving a sinking car is not as difficult as you think.

D. In short, if you know what to do in the water, you will be safe.

E. It takes 60 to 120 seconds for a car to be filled with water usually.

F. Such accidents are particularly dangerous to the risk of drowning(淹死).

G. But the sooner the window is open, the sooner you can escape directly through it.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid--we simply weigh too much, and all our mass pushes down through our relatively small feet, resulting in a lot of pressure that makes us sink.

However, several types of animals can walk on water. One of the most interesting is the common basilisk. Basilicus, a lizard (蜥蜴) native to Central and South America. It can run across water for a distance of several meters, avoiding getting wet by rapidly hitting the water's surface with its feet. The lizard will take as many as 20 steps per second to keep moving forward. For humans to do this, we'd need huge feet that we could bring up to our ears in order to create adequate "hitting. “

But fortunately there is an alternative: cornflour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a "non-Newtonian" liquid that doesn't behave like normal water. Now, if the surface of the water is hit hard enough, particles(微粒) in the water group together for a moment to make the surface hard. Move quickly enough and put enough force into each step, and you really can walk across the surface of an adequately thick liquid of cornflour.

Fun though all this may sound, it's still rather messy and better read about in theory than carried out in practice, if you must do it, then keep the water wings handy in case you start to sink--and take a shower afterward!

【1】Walking on water hasn't become a reality mainly because humans _______.

A. are not interested in it

B. have biological limitations

C. have not invented proper tools

D. are afraid to make an attempt

【2】What do we know about Basilicus from the passage?

A. It is light enough to walk on water.

B. Its huge feet enable it to stay above water.

C. It can run across water at a certain speed.

D. Its unique skin keeps it from getting wet in water

【3】 What is the function of the cornflour according to the passage?

A. To create a thick liquid.

B. To turn the water into solid.

C. To help the liquid behave normally.

D. To enable the water to move rapidly.

【4】What is the author's attitude toward the idea of humans' walking on water?

A. It is risky but beneficial.

B. It is interesting and worth trying.

C. It is crazy and cannot become a reality.

D. It is impractical though theoretically possible.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】語篇填空

One evening, an elderly lady ____【1】____ (drive) past a small town when one of her tires suddenly blew out. Even though all she had was only a flat tire, it was __【2】___ bad situation for a woman of her age. She was very ___【3】___ (annoy), especially with the weather ____【4】__ (get) colder and colder. At that moment, a man stopped his car in front of hers and asked __【5】____ she needed help. The old lady became even more nervous because the man looked poor and ____【6】___ (hunger). However, since no one else had stopped to help her during the past hours, she stood back and let him help her. After the man finished changing the tire, the lady was willing __【7】___ (pay) him any amount of money. To her __【8】______ (astonish), the man replied that he just wanted to help her, just as others had helped him in the past. He didn’t want the lady to pay him back anything. Instead, he just wanted her to help others _【9】__ need as well. Later that evening, the lady helped a heavily pregnant woman. __【10】__ never occurred to her that the woman was the poor man’s wife.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】完成句子

【1】棗莊位于山東的西南部。（be situated）

____________________________________________________________________。

【2】面對困難，我們可以向老師求助。（face）

____________________________________________________________________。

【3】是我們采取措施保護環(huán)境的時候了。( take measures to )

____________________________________________________________________。

【4】我在做飯，弟弟卻在做作業(yè)。（while）

____________________________________________________________________。

【5】我突然想到編個故事來逃避懲罰。（It occurs to sb…）

____________________________________________________________________。

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】單句改錯

以下每個句子僅涉及一個單詞的增加、刪除或修改。

增加：在缺詞處加一個漏字符號（/\），并在其下面寫出該加的詞。

刪除：把多余的詞用斜線（\）劃掉。

修改：在錯的詞下劃一橫線，并在該詞下面寫出修改后的詞

【1】Comparing with those homeless children, you’ll find you are fortunate and happy.

【2】Email, as well as telephones, are playing an important part in daily communication.

【3】With time went by, he got used to the life there.

【4】What the teacher said should be paid special attention.

【5】He didn’t know which door the key was belonged to.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】書面表達

人人都渴望朋友和友誼。為此，有人提出了建立，加深和保持友誼的三要素：1.誠實：建立友誼；2.慷慨大方和樂于分享：加深友誼；3.通情達理：使友誼持久。請圍繞以上三點，寫一篇說明文，注意：1.使用一般現(xiàn)在時態(tài)；2.詞數(shù)100左右；3.參考詞匯：understanding adj./n.通情達理的/理解；generosity n.慷慨大方。

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】閱讀下面材料，在空白處填入適當?shù)膬?nèi)容（不多于3個單詞）或括號內(nèi)單詞的正確形式。

Tim: Jeff, do you prefer working in a group or working ___【1】___?

Jeff: I’m good at __【2】__(work) by myself because if I am doing something I like, I can get it done ___【3】___( quick). __【4】__, if I am working with a team where people all want to do a good job, I think __【5】_ team is fun.

Tim: Do you prefer working wearing a uniform or putting whatever you want?

Jeff: I think __【6】__ you wear a uniform, sometimes you get respect.

Tim: So, how about a working schedule? Would you prefer a set time job?

Jeff: No. I think __【7】__ is difficult to do a set time job. Last year, I __【8】__(produce) furniture in a factory. Every morning, I had to get up at six. When I got home after work, it was almost eight.

Tim: You __【9】__ be very tired. By the way, do you prefer being paid by the hour or do you prefer salary?

Jeff: I think salary may be a __【10】__(good) way to go than being paid by the hour.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】The Farmer, His wife, and the Open Door

Once upon a time, there lived a poor farmer and his wife. One day, having finished their day’s labor and eaten their simple supper, they were sitting by the fire. 【1】 It was blown open by wind.

“Darling, shut the door!” said the man.

“No way, shut it yourself!” said the woman.

“I will not shut it, and you shall not shut it,” said the man, “but let the one who speaks the first word shut it.”

【2】

In the middle of the night they heard a noise, and looking around, they found that a wild dog had entered the room, and that he was busy eating their food. Not a word, however, would either of these silly people say, and the dog, having eaten as much as he wanted, went out of the house.

【3】

When she was out, a barber entered, and said to the husband, “Why are you sitting here all alone?” 【4】 The barber then shaved his head, but still he did not speak; then he shaved off half his beard, but even then the man kept silent. “The man is crazy!” cried the barber, and he quickly escaped out of the house.

At the moment, the wife returned from the shop. 【5】 .

“You spoke the first word,” said the farmer, “so please shut the door.”

A． His words pleased the wife, and so the old couple, well satisfied, went in silence to bed.

B． And then they had a quarrel over who should shut the door.

C． The next morning the woman went shopping by herself.

D． The old couple fell asleep happily at night.

E．The farmer didn’t answer a word.

F．She, seeing her husband in such a strange condition, cried, “Ah! What have you been doing?”

G．The farmer and his wife were stupid.

查看答案和解析>>

同步練習冊答案