1、Module 5A Lesson in a Lab课时作业17.单句语法填空1I felt a strange mixture (mix) of excitement and fear when hearing the news.2What was Lucys first reaction (react) when you told her about the news?3It is still too early to reach a conclusion (conclude) on this point.4Generally speaking, when heated to 100 ，wa
2、ter reaches its boiling (boil) point.5The engine of the ship was out of order and the bad weather added to the helplessness of the crew at sea.6Our school was offered much equipment (equip) by the local government，which delighted all of us.7Dont throw your clothes about. Put them in order.8We got to
3、 the stage where we should sit down and have a good talk with our parents.9Twofifths of the land in that district is covered (cover) with trees and grass.10Its wise of you to think (think) twice before you make the final decision.完成句子1护肤品在中国的受欢迎程度是化妆品的三倍。Skin care is about three times as popular in
4、China as makeup.2我三分之一的业余时间都用来读书。One third of my spare time is spent in reading books.3你不敲门就走进别人的房间是不礼貌的。It is not polite of you to enter others room without knocking at the door.4汽车开走了，我们只好等下一辆了。There goes the bus. Well have to wait for the next.5我认为让他们认识到这一点很重要。I think its important for them to re
5、cognize it.串点成篇微表达我想起(think of)了前几天老师做的一次实验。下面就是实验的步骤：首先在试管的底部 (at the bottom of) 放一块铜(copper)，然后加入(add.to.) 一些盐和水的混合(mixture)溶液。放置两天以便于发现 (find out) 是否有氧化物生成。最后放入其他金属，并把这些金属的反应物 (reaction) 按顺序排列 (put.in order)。实验后，我们得出结论 (conclusion)：铜不与盐发生反应 (react with)。I thought of an experiment done by my teach
6、er the other day. Here are the steps of the experiment. Firstly, put a piece of copper at the bottom of the tube. Secondly, add some mixture of water and salt to the tube. Leave it for two days to find out if an oxide can be produced. Lastly, put other metals into the mixture and put the reaction of
7、 the metals in order. After the experiment, we came to a conclusion that copper doesnt react with salt.阅读理解Science experiments are a fun way for kids to learn all about science. I will introduce a few great experiments and teach your child all about the wonders of inertia (惯性)Coin ShootYoull need so
8、me coins, at least eleven, and a smooth table. Stack (堆叠) all but one of the coins on the smooth table, making sure that the “high rise” is straight. Coins with wide edges make this experiment easy to do. Flick (弹) the extra coin quickly towards the bottom of the stack so that it hits the bottom coi
9、n. The bottom coin from the stack should shoot out from under the other coins without changing the rest of the stack. With good aim and quick flicks of your finger, you should be able to shoot all of the coins out of the stack one by one. Because the inertia of the stack of coins is so great, the fo
10、rce from the flicked coin is not enough to make the entire stack move or fall down.The Pencil StandingPlace a narrow piece of paper on a smooth table. Hold the paper so that most of it hangs off the table. Place a pencil on the paper so that it is standing straight. Now, slowly try to pull the paper
11、 out from under the pencil. What happens? Set up the paper and pencil again, and give the paper a fast pull. What happens to the pencil this time?Since the still pencil wants to stay at rest, it will be against the fast movement of the paper. This means that when the paper is moved quickly out from
12、under the pencil, the pencil remains standing straight. If the paper is moved slowly, the movement has a chance to influence the pencil, and it will fall down.科学实验能够帮你直观地探索科学奥秘。本文教你如何了解惯性的存在。1Which of the following is used in both of the two experiments?AA narrow piece of paper.BA number of coins.CA
13、 smooth table.DA new pencil.答案：C解析：细节理解题。由第二段第一句和第三段第一句可知，两个实验中都用到了 a smooth table。2What result can we get if we do the first experiment well?AThe stack of coins fall down on the table.BThe bottom coin is flicked out of the stack.CAll of the coins are taken away from the table.DAll of the coins are
14、shot out of the stack one by one.答案：D解析：细节理解题。根据第二段倒数第二句可知，如果将这个实验做好，摞起来的硬币会一枚一枚地被击出。3Most of the paper hangs off the table so that .Awe can pull it quicklyBwe can take hold of itCit can influence the pencilDthe pencil can stand straight答案：A解析：推理判断题。根据第三段倒数第二句“Set up the paper and pencil again, and
15、give the paper a fast pull.”可推知，这样放纸条是为了能够迅速地抽出纸条，故答案为A项。4If we pull the paper slowly out from under the pencil, the pencil will .Amove slowly with the paperBstand straight on the tableCbe shot out from the tableDfall down on the table答案：D解析：细节理解题。根据文章最后一句可知，如果慢慢地抽出铅笔下面的纸条，那么纸条就会影响到铅笔，铅笔就会倒在桌子上。.七选五
16、Go greenAre you worried about our earth？Do you want to do what you can to save it? 1 It may seem like the actions of one person wont make a difference, but there are actually many ways you can help.Here are some of them.Turn it off.Turn off anything that uses electricity when not in use. 2 If you le
17、ave your television on or dont turn off lights, its wasting electricity. Remember to turn things off when you dont need them.Start recycling (回收利用)Its not just paper, plastic and glass that can be recycledclothes can be, too. 3 Its good for the environment and youll get a new look for free! 4 You do
18、nt have to travel far to get what you need, and products dont have to travel far to get to you, either.Shop at farmers markets and buy food that was produced as close to your home as possible.And when youre online shopping, try to find things that wont have to travel long distances.Save water.If you
19、 dont let the water run when youre brushing your teeth and take showers instead of baths, you will be using less water and less energy but youll still be just as clean！ 5 Use a method that requires less water to get the dishes clean.ABuy things nearby.BThink before you eat.CIts hard to know where to
20、 start.DTurn short jeans youve grown out of into shorts.EAlso, dont wash dishes with the water running continuously.FThis goes for lights, televisions, computers, printers, and so on.GBring a reusable water bottle with you when travelling or at work.本文是一篇说明文。文章介绍了几种保护环境的方法。1C解析：C项“Its hard to know w
21、here to start.”和下文中的“but there are actually many ways you can help”在语意上构成转折，符合语境。2F解析：F项中的“lights, televisions, computers, printers”呼应上文中的“electricity”和下文中的“television”和“lights”。3D解析：D项中的jeans和shorts呼应上文中的“clothes”。且D项表达的内容符合上文中提到的“can be recycled”。4A解析：A项中的nearby呼应下文中的“dont have to travel far”和“as close to your home as possible”。5E解析：E项中的“wash dishes”呼应下文中的“get the dishes clean”。且E项中的“dont wash dishes with the water running continuously”和上文中的“you dont let the water run when youre brushing your teeth and take showers”构成并列关系，E项中的Also承接上文。