The suggestion they all objected to to be effective finally.
A.proving | B.prove | C.had proved | D.proved |
D
解析试题分析:句意:他们都反对的那个建议最后证明是有效的。这里they all objected to是定语从句,先行词是suggestion,关系词是作宾语,给省略掉了;这里缺少的是谓语动词,故排除A;根据objected用的是过去式,可知答案应是D。
考点:考查动词时态的用法。
点评:本题难度适中。动词时态的考查与一定的语境结合一起增加了试题的难度,有的考生时态的用法背的很熟,但在不同的语境下,就做不对了,提醒考生一定要会分析理解语境。
即学即练: Planing so far ahead no sense—so many things will have changed by next year.
A.made B.is making C.makes D.has made
解析:C。句意:“计划这么超前毫无意义—到明年许多事情会发生变化的。”前句表示现在的情况make no sense,后句表示到将来会产生的后果will have changed。一般现在时表示主语的特征或状态。is making和has made表示具体的动作过程,故不选。因此选C。
科目:高中英语 来源:同步题 题型:阅读理解
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科目:高中英语 来源: 题型:阅读理解
The population of the earth goes on increasing at its present rate and there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth’s resources are completely exhausted it will be possible to change the atmosphere of Venus(火星)and to create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan sugges that algae(藻类)organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be developed in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
1.In the long run, the most difficult problem caused by population growth on earth will probably be the lack of .
A.food B.oil C.space D.resources
2.Carl Sagan believes that people might live on Venus because .
A.it might be possible to change its atmosphere
B.its atmosphere is the same as the earth’s
C.there is a good supply of water on Venus
D.the days on Venus are long enough
3.Algae can be developed on Venus because they are able to .
A.live in very hot temperatures B.live in very cold temperatures
C.produce oxygen D.all of the above
4.According to the writer, the most key condition for man to land on Venus eventually is that .
A.the algae have done their work B.the atmosphere becomes cooler
C.there is enough oxygen D.it rains there
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