2021年英语四级考试完型填空模拟题含答案解析(5)

1、英语四级考试完型填空模拟题含答案解析(5) Spa _ is a dangerous pla _, 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 _ke the food which we 4. Heat, 5, _kes our enviro _en

2、ts tolerable and some ultraviolet rays(紫外线的) perate the 6. Co _ic(宇宙的) rays of various kinds e 7 the air from outer spa _, but 8 quantities of radiation from the sun are screened off. 9 men leave the atmosphere they are 10 to this radiation; 11 their spa _suits or the walls of their spa _craft, if t

3、hey are inside, 12 prevent a lot of radiation da _ge.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 co _ic rays and from radioactive minerals.The“16”dose of radiation that we re _

4、ive each year is about two millirems; it 17 aording toswheresyou live, and this is a very rough esti _te. Scientists have reason to think 18 a _n can 19 far more radiation 20 without being da _ged; the figure of 60 rems has been agreed. Jo _1.A.for B.with C.on D.as Jo _2.A.stars B.sun C.earth D.spa

5、_ Jo _3.A.with B.from C.under D.for Jo _4.A.use B.live C.eat D.get Jo _5.A.again B.also C.besides D.too Jo _6.A.enviro _ent B.spa _ C.atmosphere D.earth Jo _7.A.across B.to C.from D.through Jo _8.A.valid B.enormous C.various D.proper Jo _9.A.As soon as B.As well as C.As much as D.As possible as Jo _

6、10.A.shown B.exposed C.fa _d D.covered Jo _11.A.but B.because C.so D.so that Jo _12.A.get B. _ke C.have D.do Jo _13.A.earth B.atmosphere C.spa _ D.enviro _ent Jo _14.A.pie _s B.units C.parts D.elements Jo _15.A.re _ive B.aept C.bring D.catch Jo _16.A.conventional B.mon C.general D.nor _l Jo _17.A.sh

7、ifts B.converts C.modifies D.varies Jo _18.A.what B.which C.that D.why Jo _19.A.put up with B.keep up with Jo _ C.e up with D.catch up with Jo _20.A.from B.than C.as D.away 答案及解析： 1. D 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. C 见上题分析。 3. D be essential for“对来说是首要的、基础的”，固定搭配。 4. C

8、 只有eat与先行词food和定语从句which we搭配。 5. D 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. C 根据上题所讲，perate这个动词后面应接atmosphere“大气”这个名词。 7. D 这里的e through相当于perate，穿透。e across“偶遇”；e to“来到”；e from“”。本句意为：各类外部空间的宇宙射线穿透大气层，故选e through。 8. B Valid有效的；various各种各样的；proper合适的。在四个选项中只有eno

9、rmous表示“大量的”意思。 9. A 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. B be exposed to“暴露于”，show“展示”；fa _“面对”。 11. A 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. D Do +动词原型的结构表示强调谓语动词。 13. C 由radiation和explorers可推测，应选spa _(太空)。本句意为射线是探险者在太空遇见的

10、已知的最大危险。 14. B unit“单位、单元”；element“元素”；part“部分”；pie _“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. A re _ive表示客观收到；aept表示主观接受。我们受到的辐射并非主观接受。 16. D conventional“传统的”；mon“共同的、普通的”；general“一般的、总体的”；nor _l“正常的”。本句意为：我们每年接受的正常辐射量，故选nor _l。 17. D shift“ _”；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. C 本句应填入引导宾语从句的代词，而从