Module 6 Unexplained Mysteries of Natural Section Ⅱ Grammar
Ⅰ.用下列情态动词完成句子
1．Mr White ________ have arrived at 8：30 for the meeting, but he didn't turn up.
2．—Tom, I have cleaned the room for you.
—Thanks. You ________ not have done it. I can manage it.
3．He ________ not have been more than 20 years old, because he just graduated from school.
4．He ________ have finished his work, but I'm not sure.
5．I ________ have come to the party yesterday, but I had an unexpected visitor. 6．He ________have completed his work; otherwise, he wouldn't be enjoying himself by the seaside.
答案：1.should 2.need 3.can 4.may/might 5．would 6.must
Ⅱ.用括号内所给动词的适当形式填空
1．You should ________ (hand in) your composition yesterday. 2．The dinosaurs may ________ (stop) evolving already. 3．He may ________ (come) soon; I'm not sure.
4．There must ________ (be) dinosaurs today living in other galaxies. 5．In the past a huge meteorite might ________ (hit) all the dinosaurs. 6．You must ________ (know) everything now.
7．It can't ________ (be) him; he doesn't wear glasses. 8．If only I ________ (follow) your advice.
9．He suggested that the meeting should not ________ (put off)． 答案：1.have handed in 2.have stopped 3.come
4．be 5.have hit 6.have known 7.be 8.had followed 9.be put off Ⅲ.单句改错
1．—What do you suppose has happened to him? —I don't know. He should have got lost.
_________________________________________________ 2．—Jerry doesn't mind lending you his bike. —He couldn't. I have borrowed Mary's.
___________________________________________________ 3．If he had been here, he can have given us some help. ____________________________________________________ 4．I didn't hear the phone. I should have been asleep. _____________________________________________________
5．He knew nothing about the book. He mustn't have read it before. _____________________________________________________
6．Liu Dong was in Jinan yesterday，so he shouldn't have come. ___________________________________________________ 7．—Did Mary come to the party?
—I don't know. She must have come while I was out. ______________________________________________________
8．He can have finished his work; otherwise, he wouldn't be enjoying music in his study.
______________________________________________________ 9．She is two hours late. What may happen to her?
______________________________________________________
10．Everyone in my class passed the exam. It mustn't have been difficult. _____________________________________________________ 答案：1.should→may/might 2.couldn't→needn't 3．can→could/might/would 4.should→must 5．mustn't→couldn't 6.shouldn't→couldn't 7．must→may/might 8.can→must 9．may happen→can have happened 10．mustn't→can't Ⅳ.完形填空
It was July 1976. An unmanned spaceship, Viking One, had arrived at Mars. On July 20th, the spaceship __1__. Part of it continued toward a landing on the planet. It fell __2__ through the late afternoon Mars' sky.
Forty kilometers above the planet, the thin __3__ began to slow its fall. Six kilometers above the planet a big parachute(降落伞) opened. The landing craft fell more slowly. Then, three rocket engines __4__. And the landing craft set down __5__ on the surface. __6__ in the Viking One Lander immediately sent a message to the earth. It said, “I am here. I am down safely. I am beginning my work.”
The message __7__ at the speed of light. It took twenty minutes to reach the earth, more than three hundred and twenty million kilometers __8__. Scientists and engineers at the control center __9__.
Moments later, television receiver in the control center began to __10__ the first picture from Viking One. People at the center could see the feet of the landing craft sitting firmly on the __11__ soil of Mars. Those pictures were our first __12__ look at the planet. They showed a red surface, full of rocks, with no sign of __13__. It was our first look at a planet that is full of surprises, mysteries and promise. Viking One was launched toward Mars in August, 1975. The spaceship had two __14__：an orbiter(轨道飞行器) and a lander(着陆器). The orbiter would circle __15__ Mars. It would take pictures of Mars' surface. It would __16__ the atmosphere.
The __17__ would go down to the surface. It would carry __18__ to dig up and study soil and __19__.
It also would report about any evidence of life on the planet. The lander would send this __20__ to the orbiter and then back to the earth.
1．A. separated B. appeared C. worked D. started 2．A. correctly B. slowly C. quickly D. directly 3．A. air B. universe C. space D. atmosphere 4．A. fired B. fell C. opened D. floated 5．A. heavily B. softly
C. suddenly D. immediately 6．A. A computer B. A rocket C. A pilot D. An astronaut 7．A. spread B. traveled C. shot D. moved 8．A. far B. long C. distant D. away 9．A. shouted B. watched C. cheered D. welcomed
10．A. make B. take
C. show D. search 11．A. red B. brown
C. gray D. black 12．A. careful B. close
C. real D. clear 13．A. men B. life
C. trees D. air 14．A. parts B. rockets
C. engines D. centers 15．A. through B. towards
C. over D. around 16．A. enter B. examine
C. collect D. discover 17．A. orbiter B. lander
C. spaceship D. rocket 18．A. engineers B. astronauts
C. parachutes D. instruments 19．A. surface B. trees
C. rocks D. pictures 20．A. spaceship B. rocket
C. lander D. information 答案与解析：
1．A 根据文章倒数第三段可知“海盗一号”宇宙飞船由orbiter和lander两部分组成，到了火星上空两部分分离。
2．C 根据常识判断宇宙飞船应该在飞行时是很快的，在遇到阻力时才会减速，这也与后面飞行减缓后的“slowly”相对应。
3．D thin可以修饰air和atmosphere，但是只有atmosphere符合语境，火星的大气减慢它的飞行，而且与后文也一致。
4．A rocket的作用就是通过发射把lander送到火星上，着陆时需要对地面的反推力才不至于着陆太猛。
5．B 因为前面所述的各种措施，如降落伞、火箭发动机等，所以是轻轻着陆。 6．A “海盗一号”是无人载飞船，所以只能通过电脑发送信息说其在工作。
7．B 根据上下文，message以光速“传播”，spread“扩散”；shoot“发射”；move“移动”。
8．D 表示距离时，如果有具体的数字，后面应是away。 9．C 火星登陆成功，人们欢呼起来，shout“大喊”；watch“看”；welcome“欢迎”。 10．C 在屏幕上show“显示”发送回来的图片，其他三项意思不符。 11．A 火星上的土壤是红色的，所以后面第二句提到红色的火星表面。
12．B 这些照片是在火星上拍摄的，所以是close look“近看”，real不修饰look。 13．B 根据常识可知，火星上没有生命的迹象，更没有树和人。 14．A 宇宙飞船有两部分，由下一句话可得知答案。 15．D circle around Mars环绕火星飞行。
16．B examine指“检验”。enter“进入”，collect“收集”，discover“发现”都不合适。
17．B 由上文可知，宇宙飞船分两部分，前面介绍了orbiter，这里介绍lander。 18．D 在火星上，“海盗一号”只能通过一些科学仪器对火星上的土壤和岩石进行检验。
19．C 由前文中“full of rocks”可知答案。
20．D 着陆器把在火星上得到的信息传给轨道飞行器，然后传到地球上来。 Ⅴ.语法填空
On a very cold evening, an old man was waiting for a ride across the river. He saw several horsemen pass by but he didn't ask for any help. The wait seemed __1__ (end). Then came another rider, the old man __2__(catch) his eye and said, “Sir, would you mind doing me a favor？” Stopping his horse, he replied, “Of course！” Almost, __3__ (freeze), the old man __4__ get off the ground. The horseman helped him onto his horse. He took the old man not just across the river, __5__ to his home. “Sir, you didn't even ask the other riders for help, why? What __6__ I had said “no” and left you there？” the horseman asked. The old man looked at him straight in the eyes and said, “I looked into their eyes, I found they didn't care, __7__ told me it would be useless, but when I looked into __8__， I saw kindness”. These words touched the rider deeply. “Thank you for __9__ you've said，I hope I will never be too busy to help others.” With that, Thomas Jefferson, the __10__ (three) president of the US, turned his horse around and went away.
答案与解析：
1．endless 句中用形容词作表语。再根据上文，可确定为endless“无尽的”。 2．caught catch one's eye为固定表达，意为“引起某人的注意”；整篇文章的基本时态为一般过去时。
3．frozen 形容词作状语，修饰主语the old man，故用frozen“冻僵了的”。 4．could not 由上句可知不能动了。
5．but also not just...but also为并列连词，意为“不仅……而且”。 6．if 句型What if...？意为“如果……将会怎样？”
7．which which引导非限制性定语从句，修饰前面的整句话。 8．yours 用名词性物主代词yours指代your eyes。
9．what。引导词在介词for后跟的宾语从句中作宾语，且表示“……的事物”，故用what。
10．third 应用序数词修饰名词president。
高中英语Module6UnexplainedMysteriesofNaturalSectionⅡGrammar课时作业外研版必修4
