成人英语三级《完形填空》专项冲刺试题(14)

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成人英语三级《完形填空》专项冲刺试题(14)

Dalton wondered why the heavier and lighter gases in the atmosphere did not separate as oil and water do.He finally concluded that the constituent__1__must exist in the form of __2__ particles or atoms and that these__3__ be completely mixed together in the__4__.This threw a new light in __5__ laws of definite proportions.It was __6__ necessary to suppose that the atoms___7__combinesintossmall groups of uniform__8__and so form more complex substance; __9__ the mystery of this law was__10__.Dalton suggested, for example, that carbon monoxide__11__formed by the one with one__12__of atoms of carbon and oxygen,__13__carbon dioxide results from a single__14__of carbon uniting with two atoms__15__oxygen.Assuming this to be true,__16__the definite proportions of Prout's law (__17__ all chemical compounds the different constituents__18__enter in unvarying proportions) would naturally__19__the relative weights of the many___20__kinds of atoms.

1.A.gases B.pieces C.things D.gas

2.A.timely B.trimmed C.tiny D.topical

3.A.ought B.could C.will D.must

4.A.sky B.atmosphere C.oxygen D.environment

5.A.various B.many C.the D.those

6.A.only B.too C.that D.extremely

7.A.should B.were C.get D.could

8.A.construct B.structure C.piece D.feature

9.A.but B.also C.thus D.nevertheless

10.A.solved B.discovered C.broked D.told

11.A.must B.been C.were D.is

12.A.putting B.pairing C.placing D.preparing

13.A.while B.when C.therefore D.also

14.A.piece B.type C.atom D.measure

15.A.from B.in C.of D.for

16.A.then B.so C.by D.that

17.A.from B.in C.to D.for

18.A.are B.wouldn?t C.always D.never

19.A.describe B.unit C.mix D.reveal

20.A.different B.usual C.important D.chemical

参考答案

1.【答案】A 【解析】根据上文中的heavier and lighter gases可以确定，本空中应填入“组成的气体”，即constituent gases.

2.【答案】C 【解析】根据句子意思判断，句中的词意为微粒的意思，选项C.tiny合乎题意。

3.【答案】D 【解析】情态动词must在这里是“必定、必须”的意思。

4.【答案】B 【解析】sky意为“天空”，atmosphere意为“大气”，oxygen意为“氧气”，environment意为“环境”，只有B项正确。

5.【答案】C 【解析】这帮助解释了大气组成气体的比例确定原理。因为是特指这一原理，用定冠词the.

6.【答案】A 【解析】only necessary的意思是“仅仅是必要”。故A正确。

7.【答案】D 【解析】根据句子意思判断，could是“能够”的意思。

8.【答案】B 【解析】根据句子意思判断，这里需要“结构”这个词，而B合乎题意。

9.【答案】C 【解析】but，nevertheless表示转折意为“但是”，“然而”;thus意为“因此”，如There has been no rain.Thus, the crops are likely to suffer.一直没有下雨，因此庄稼可能会受害。这里与上文有因果关系，故应选C.

10.【答案】A 【解析】solve相当于find a solution or an answer to，意为“解决”、“解开”，如：solve a problem (a puzzle, a mystery);discover相当于find something existing but not known before，意为“发现”，如： discover a place (a fact, the truth)。因此应选A.

11.【答案】D 【解析】因为是表一般规律，又是单数，所以用is这个词。

12.【答案】B 【解析】Pair这里是“匹配，配成双”的意思。

13.【答案】A 【解析】while表示对比。如：Some substances are soluble, while others are not.一些物质是可溶的，而另一些物质是不可溶的。

14.【答案】C 【解析】根据句子意思判断，atom正确。

15.【答案】C 【解析】of表示“含量，分量”。

16.【答案】A 【解析】then的意思是next，after that.

17.【答案】D 【解析】for的意思是“对于，就……而言”。

18.【答案】C 【解析】根据句子意思判断。

19.【答案】B 【解析】describe意为“描述”;unite意为“结合，合并”;mix意为“(不同的东西)混合在一起”，如：mix flour and water;reveal意为“揭露，揭示”。

20.【答案】A

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