2010年12月英语四级考试完形填空提高练习(24)
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The rocket engine, with its steady roar like that of a waterfall or a thunderstorm, is an impressive symbol of the new space age.Rocket engines have __1__ powerful enough to shoot astronauts __2__ the earth's gravitational pull and __3__ them on the moon.We have now become __4__ space.
Impressive and complex __5__ it may appear, the rocket, which was __6__ in China over 800 years __7__ , is a relatively simple device.Fuel that is __8__ in the rocket engine changes __9__ gas.The hot and rapidly __10__ gas must escape, but it can do so only __11__ an opening that __12__ backward.As the gas is __13__ with great force, it __14__ the rocket in the __15__ direction.Like the kick of a gun __16__ it is fired, it __17__ the laws of nature __18__ by Sir Isaac Newton when he discovered that“ __19__ every action, there is __20__ equal and opposite reaction.”
1.A.shown B.been C.appeared D.proved
2.A.against B.despite C.beyond D.from
3.A.send B.land C.take D.carry
4.A.travelers B.astronauts C.researchers D.explorers
5.A.that B.so C.as D.sometimes
6.A.made B.discovered C.developed D.invented
7.A.in advance B.before C.earlier D.ago
8.A.round B.contained C.stored D.burned
9.A.as B.into C.for D.the
10.A.heating B.escaping C.expanding D.conducting
11.A.in B.at C.by D.through
12.A.turns B.goes C.faces D.directs
13.A.transmitted B.dispersed C.erected D.radiated
14.A.attracts B.leads C.pulls D.pushes
15.A.same B.other C.opposite D.wrong
16.A.that B.when C.if D.although
17.A.states B.proves C.follows D.breaks
18.A.described B.discussed C.considered D.made
19.A.like B.as C.with D.for
20.A.no B.an C.another D.theCloze
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1.【答案】D
【解析】因其后接形容词powerful作表语故应填系词。shown不是系词;been和appeared虽可作系词但与句意不符;而proved可作系词，意为“证明是”，符合句意。
2.【答案】C
【解析】根据意思判断，beyond意为“超出，超过”。
3.【答案】B
【解析】因land on意为“使……着陆”,而send, take和carry表示“把……送到……上去”时,常接介词to,故应选land.
4.【答案】A
【解析】根据意思判断，travelers正确.
5.【答案】C
【解析】原句是表示让步的状语从句，而且是一个倒装句，故只能选C as。
6.【答案】D
【解析】根据词的意思区分，invented(指发明)合乎题意。
7.【答案】D
【解析】该句为which引导的定语从句，意为“中国发明火箭是在距今800多年前。”句中谓语是一般过去时，故应选D.ago。
8.【答案】D
【解析】根据句子意思判断，burned正确。
9.【答案】B
【解析】change into是固定短语，“变成”的意思。
10.【答案】C
【解析】根据句子意思判断，应选expanding gas膨胀的气体。
11.【答案】D
【解析】through的意思为“穿过，通过”。
12.【答案】C
【解析】faces意为“朝着”。
13.【答案】D
【解析】transmit意为“传递”，disperse意为“驱散”，erect意为“直立，挺直”，radiate意为“辐射，向各方向伸展”，只有D最合题意。
14.【答案】D
【解析】根据句子意思判断，应为push“推”。
15.【答案】C
【解析】朝相反的方向，故选C。
16.【答案】B
【解析】when引导的定语从句。
17.【答案】C
【解析】根据句子意思判断, follow在这里是遵循的意思。
18.【答案】A
【解析】根据句子意思判断，describe是“记载描述”的意思。
19.【答案】D
【解析】for是“对于”的意思。
20.【答案】B
【解析】根据上下文,只能用不定冠词an。
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