Unit 5 Look into Science Lesson 26 Keep the Candle Burning 同步课时练（含解析）

Unit 5 Look into Science Lesson 26 Keep the Candle Burning
一、单选题
1.She didn't leave the school _____ she worked out this problem.
A. as long as B. until C. since D. while
2.You will find that science is more interesting _____ you do more experiments.
A. unless B. though C. as D. before
3.You needn’t keep the candle________. It’s bright here.
A.burn B.to burn C.burning D.burned
4.The water in the lake______ after it rained.
A.rise B.raise C.raised D.rose
5.I will_______ them the fairy tale.
A.say B.speak C.talk D.tell
6.Let’s see_______ will happen.
A.what B.when C.how D.where
7.I fill a jar________ water.
A.with B.of C.for D.use
二、句子翻译
8.我已经用完了所有的水彩笔了。你能借给我几支吗
I have ____________ ___________ all my markers. Can you lend me some
9.我们班有五分之三的学生喜欢英语。
______________ ____________ the students in our class like English.
10.天快黑了,他们便停止工作了。
It was getting dark and they _____________ ____________.
11.让他和你一起做实验吧!
____________ ____________ ___________ the experiment with you.
12.李明, 不要忘了吹灭蜡烛。
Li Ming, don’t ____________ ____________ ____________ out the candle.
13.你沿着这条路走了多远
_____ _____ did you go along the road
14.家长们总是用尽力气让孩子们有一个美好的未来。
Parents always _____ _____ all their energy to give their children a bright future.
15.这个委员会由6位妇女组成。
The committee is _____ _____ _____ six women.
三、用下框中单词的适当形式填空。
shallow, examine, match, light, oxygen
1. Get a _____ and a candle with a cotton wick (烛芯).We will use them a little while later.
2. The doctor _____ the girl carefully and said she was nothing serious.
3. My friend came over last night to watch the video of the football _____ that I'd recorded.
4. The _____ plate can't hold too much food. Let's change a big bowl.
5. Many living things can live without _____.
四、阅读理解
What is the sky How high is it What color is it What birds can live above it These questions are difficult to answer, aren't they In fact, the sky has no color. Then why does the sky look blue
We know that there is air around the world. When planes fly, they need air to lift their wings. Planes can't fly very high. That is because the air gets thinner when they go higher. The same will happen to us if we go high enough. If we go up about 1,200 kilometers from the earth, we'll find no air there. Some birds can fly into the sky as high as a plane, but they cannot fly or live without air.
Looking up above us, you will see the blue sky with white clouds. It is usually light blue. The color would be bluer when you see on the top of a high mountain. And you will see fewer clouds in the sky between you and the sun. Sometimes the sky doesn't look blue. When the sun rises and falls, you will see red, orange, and other colors in the sky. Such are the most beautiful moments of the day.
Who can see the colors of the sky high above the earth The astronauts (宇航员)! They can see those beautiful colors of the sky from the outer space. However, before flying into the outer space, they sit in a spaceship high above the earth, and there is no air at all. The sky would be that dark and its color would be black.
Now you may understand that we see colors because the air scatters (使散射) the sunlight. Light travels through the air. Without air, there would be no colors.
1. Planes can't fly as high as possible because _____.
A. the sky is blue B. the wings are heavier
C. the air becomes thinner D. the sky has no air
2. When you stand on the top of a high mountain, you will see _____.
A. more air B. redder skies C. more colors D. fewer clouds
3. We might see many colors in the sky at about _____ during the day in summer.
A. 7:00 pm B. 11:00 pm C. 1:00am D. 3:00 am
4. The sky changes colors because_____.
A. the sunlight has colors B. the air scatters the sunlight
C. it's colorful itself D. the world is colorful
5. Which is the best title of the passage
A. Why does the sky look blue B. Why can't planes fly very high
C. Why does the sky change colors D. Why can the astronauts see the colors of the sky
答案以及解析
一、单选题
1.答案：B
解析：考查连词辨析。句意: 直到解出这道题, 她才离开学校。not... until...是固定搭配, 意为"直到……才……", 故选B。
2.答案：C
解析：句意:随着你做更多的实验,你将会发现科学更加有趣。as“随着,当……时”符合句意。
3.答案：C
解析：burning译为燃烧。
4.答案：D
解析：雨后湖里的水上涨。rose是rise的过去式,表示数量增加。
5.答案：D
解析：根据句意可知为讲童话故事,因此用tell, 告诉。
6.答案：A
解析：表示发生什么用特殊疑问词what。
7.答案：A
二、句子翻译
8.答案：used up
9.答案：Three-fifths of
10.答案：stopped working
11.答案：Let him do
12.答案：forget to blow
13.答案：How far
14.答案：use up
15.答案：made up of
三、选词填空
答案：1.lighter 2.examined 3.match / matches 4.shallow 5.oxygen
解析：1. 句意:取一个打火机和一支有棉花芯的蜡烛。我们一会儿将会用上它们。
2. 句意:医生认真地为女孩做了检查,说她病得不严重。由后面的said可知,应用examine的过去式examined。
3. 句意:我的朋友昨天晚上来看我录制的足球赛的视频。
4. 句意:这个浅盘子盛不了太多食物。我们换个大碗吧。
5. 句意:没有氧气许多生物就无法生存。
四、阅读理解
答案：1-5 CDABA
解析：1.细节理解题。根据第二段中的"Planes can't fly very high. That is because the air gets thinner when they go higher"可知,飞机不能飞得太高的原因是高空中空气太稀薄。
2.细节理解题。根据第三段中的" And you will see fewer clouds in the sky between you and the sun"可知,站在高山顶上,看到的云会少。
3.推理判断题。根据第三段中的"When the sun rises and falls, you will see red, orange and other colors in the sky. Such are the most beautiful moments of the day"可知,在日出或日落的时候可能会在天空中看到很多颜色,结合选项可推知选A。
4.细节理解题。根据最后一段中的"Now you may understand that we see colors because the air scatters (使散射) the sunlight"可知,天空改变颜色的原因是空气散射了太阳光。
5.标题判断题。根据第一段中的几个问句并结合文章内容可知, 文章主要围绕“天空为什么是蓝色的 ”这一话题展开,故A项最适合作本文标题。
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