四级完形填空模拟题大全17

最牛英语口语培训模式：躺在家里练口语，全程外教一对一，三个月畅谈无阻！

洛基英语，免费体验全部在线一对一课程：https://www.wendangku.net/doc/cb883428.html,/ielts/xd.html（报名网址）Space is a dangerous place，not only because of meteors（流星）but also because of rays from the sun and other stars.The atmosphere again acts 1 our protective blanket on 2 .Light gets through，and this is essential 3 plants to make the food which we 4 .Heat，5 ，makes our environments tolerable and some ultraviolet rays （紫外线的）penetrate the 6 .Cosmic（宇宙的）rays of various kinds come 7 the air from outer space，but 8 quantities of radiation from the sun are screened off. 9 men leave the atmosphere they are 10 to this radiation；11 their spacesuits or the walls of their spacecraft，if they are inside，12 prevent a lot of radiation damage.Radiation is the greatest known danger to explorers in 13 .Doses of radiation are measured in 14 called“rems （雷目）”。We all 15 radiation here on earth from the sun，from cosmic rays and from radioactive minerals.The“16 ”dose of radiation that we receive each year is about two millirems；it 17 according toswheresyou live，and this is a very rough estimate.Scientists have reason to think 18 a man can 19 far more radiation 20 without being damaged；the figure of 60 rems has been agreed.

1.A.for B.with C.on

D.as

2.A.stars B.sun C.earth

D.space

3.A.with B.from C.under

D.for

https://www.wendangku.net/doc/cb883428.html,e B.live C.eat

D.get

5.A.again B.also C.besides

D.too

6.A.environment B.space C.atmosphere D.earth

7.A.across B.to C.from

D.through

8.A.valid B.enormous C.various

D.proper

9.A.As soon as B.As well as C.As much as D.As possible as

10.A.shown B.exposed C.faced

D.covered

11.A.but B.because C.so

D.so that

12.A.get B.make C.have

D.do

13.A.earth B.atmosphere C.space

D.environment

14.A.pieces B.units C.parts

D.elements

15.A.receive B.accept C.bring

D.catch

16.A.conventional https://www.wendangku.net/doc/cb883428.html,monC.general D.normal

17.A.shifts B.converts C.modifies

D.varies

18.A.what B.which C.that

D.why

19.A.put up with B.keep up with https://www.wendangku.net/doc/cb883428.html,e up with D.catch up with

20.A.from B.than C.as

D.away

第十七篇答案+解说：

1.「答案」D

「解析」act as“充当、起……作用”；act for“代表、代理”；act on“按照”。本句意为大气层起到保护伞的作用。

2.「答案」C

「解析」见上题分析。

3.「答案」D

「解析」be essential for“对……来说是首要的、基础的”，固定搭配。

4.「答案」C

「解析」只有eat与先行词food和定语从句which we…搭配。

5.「答案」D

「解析」本句意为：热不仅使我们的生产环境温度适宜，而且紫外线也能穿透大气。also一般紧跟动词；besides一般用在句前；too可用在句中，用逗号隔开。

6.「答案」C

「解析」根据上题所讲，penetrate这个动词后面应接atmosphere“大气”这个名词。

7.「答案」D

「解析」这里的come through相当于penetrate，穿透。come across“偶遇”；come to“来到”；come from“来自”。本句意为：各类来自外部空间的宇宙射线穿透大气层……，故选come through.

8.「答案」B

「解析」Valid有效的；various各种各样的；proper合适的。在四个选项中只有enormous表示“大量的”意思。

9.「答案」A

「解析」as soon as“只要”；as well as“除……之外”；as much as“和……一样多”；as possible as“尽可能的”。

10.「答案」B

「解析」be exposed to“暴露于”，show“展示”；face“面对”。

11.「答案」A

「解析」本句前半句的意思是：“人们一离开大气层就会接触射线”；后半句意思是：“他们的太空服和太空船会阻止射线造成的损害”。前后应该是转折关系，故用but.

12.「答案」D

「解析」Do +动词原型的结构表示强调谓语动词。

13.「答案」C

「解析」由radiation和explorers可推测，应选space（太空）。本句意为射线是探险者在太空遇见的已知的最大危险。

14.「答案」B

「解析」unit“单位、单元”；element“元素”；part“部分”；piece“碎片”本句意为：射线的多少可以以雷目这个测量单位测量。

15.「答案」A

「解析」receive表示客观收到；accept表示主观接受。我们受到的辐射并非主观接受。

16.「答案」D

「解析」conventional“传统的”；common“共同的、普通的”；general “一般的、总体的”；normal“正常的”。本句意为：我们每年接受的正常辐射量……，故选normal.

17.「答案」D

「解析」shift“移动”；convert“转换”；modify“修改”；vary“变化”。根据句意，所处地点不同，所受辐射量也不一样……，故选varies.

18.「答案」C

「解析」本句应填入引导宾语从句的代词，而从句不缺少主语和宾语，因而不选择what和which，又加之主句是陈述语气，故选择that.

19.「答案」A

「解析」put up with“忍受”，固定搭配。keep up with和catch up with 意为跟上，come up with意为提出。

20.「答案」B

「解析」more （radiation）后应加than.

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