四级完型填空模拟训练－3

四级完型填空模拟训练－3,标签：四级完形填空真题答案,四级完形填空练习技巧,http://www.xuehuiba.com

　　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

　　【答案解析】

　　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。

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