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2008英语四级完型填空模拟训练(二十四)

Source:     2008-04-09  我要投稿   论坛   Favorite  
  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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