The rocket engine, with its steady roar like that of a waterfall or athunderstorm, is an impressive symbol of the new spaceage.Rocket engines have 1_ powerful enough to shootastronauts 2_ the earth’s gravitational pull and 3_ them on themoon.We have now become 4_ space.
Impressive and complex 5_ it may appear, the rocket, whichwas 6_ in China over 800 years 7_ , is a relatively simpledevice.Fuel that is 8_ in the rocket engine changes 9_ gas.The hot and rapidly 10 _gas mustescape, but it can do so only 11_ an opening that 12_ backward.As the gas is 13_ with greatforce, it 14_ the rocket in the 15 _direction.Like the kick of a gun 16_ it is fired, it 17_ the laws ofnature 18_ by Sir Isaac Newton when he discovered that“ 19_ every action, there is 20_ equaland 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
1.【答案】D
【解析】因其后接形容詞powerful作表語故應填系詞。shown不是系詞；been和appeared雖可作系詞但與句意不符；而proved可作系詞，意為“證明是”，符合句意。
2.【答案】C
【解析】根據意思判斷，beyond意為“超出，超過”。
3.【答案】B
【解析】因land on意為“使……著陸”,而send, take和carry表示“把……送到……上去”時,常接介詞to,故應選land.
4.【答案】A
【解析】根據意思判斷，travelers正確.
5.【答案】C
【解析】原句是表示讓步的狀語從句，而且是一個倒裝句，故只能選C as。
6.【答案】D
【解析】根據詞的意思區(qū)分，invented(指發(fā)明)合乎題意。
7.【答案】D
【解析】該句為which引導的定語從句，意為“中國發(fā)明火箭是在距今800多年前?！本渲兄^語是一般過去時，故應選D.ago。
8.【答案】D
【解析】根據句子意思判斷，burned正確。
9.【答案】B
【解析】change into是固定短語，“變成”的意思。
10.【答案】C
【解析】根據句子意思判斷，應選expanding gas膨脹的氣體。
11.【答案】D
【解析】through的意思為“穿過，通過”。
12.【答案】C
【解析】faces意為“朝著”。
13.【答案】D
【解析】transmit意為“傳遞”，disperse意為“驅散”，erect意為“直立，挺直”，radiate意為“輻射，向各方向伸展”，只有D最合
題意。
14.【答案】D
【解析】根據句子意思判斷，應為push“推”。
15.【答案】C
【解析】朝相反的方向，故選C。
16.【答案】B
【解析】when引導的定語從句。
17.【答案】C
【解析】根據句子意思判斷, follow在這里是遵循的意思。
18.【答案】A
【解析】根據句子意思判斷，describe是“記載描述”的意思。
19.【答案】D
【解析】for是“對于”的意思。
20.【答案】B
【解析】根據上下文,只能用不定冠詞an。
Impressive and complex 5_ it may appear, the rocket, whichwas 6_ in China over 800 years 7_ , is a relatively simpledevice.Fuel that is 8_ in the rocket engine changes 9_ gas.The hot and rapidly 10 _gas mustescape, but it can do so only 11_ an opening that 12_ backward.As the gas is 13_ with greatforce, it 14_ the rocket in the 15 _direction.Like the kick of a gun 16_ it is fired, it 17_ the laws ofnature 18_ by Sir Isaac Newton when he discovered that“ 19_ every action, there is 20_ equaland 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
1.【答案】D
【解析】因其后接形容詞powerful作表語故應填系詞。shown不是系詞；been和appeared雖可作系詞但與句意不符；而proved可作系詞，意為“證明是”，符合句意。
2.【答案】C
【解析】根據意思判斷，beyond意為“超出，超過”。
3.【答案】B
【解析】因land on意為“使……著陸”,而send, take和carry表示“把……送到……上去”時,常接介詞to,故應選land.
4.【答案】A
【解析】根據意思判斷，travelers正確.
5.【答案】C
【解析】原句是表示讓步的狀語從句，而且是一個倒裝句，故只能選C as。
6.【答案】D
【解析】根據詞的意思區(qū)分，invented(指發(fā)明)合乎題意。
7.【答案】D
【解析】該句為which引導的定語從句，意為“中國發(fā)明火箭是在距今800多年前?！本渲兄^語是一般過去時，故應選D.ago。
8.【答案】D
【解析】根據句子意思判斷，burned正確。
9.【答案】B
【解析】change into是固定短語，“變成”的意思。
10.【答案】C
【解析】根據句子意思判斷，應選expanding gas膨脹的氣體。
11.【答案】D
【解析】through的意思為“穿過，通過”。
12.【答案】C
【解析】faces意為“朝著”。
13.【答案】D
【解析】transmit意為“傳遞”，disperse意為“驅散”，erect意為“直立，挺直”，radiate意為“輻射，向各方向伸展”，只有D最合
題意。
14.【答案】D
【解析】根據句子意思判斷，應為push“推”。
15.【答案】C
【解析】朝相反的方向，故選C。
16.【答案】B
【解析】when引導的定語從句。
17.【答案】C
【解析】根據句子意思判斷, follow在這里是遵循的意思。
18.【答案】A
【解析】根據句子意思判斷，describe是“記載描述”的意思。
19.【答案】D
【解析】for是“對于”的意思。
20.【答案】B
【解析】根據上下文,只能用不定冠詞an。