Question

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡的相应位置上。

If the population of the Earth keeps on increasing at its present rate, there will eventually not be enough resources 1.________(leave) to support life on the planet. By the middle of the 21st century, if present trends continue, we2._________（use）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 the earth will make 3. ______ necessary for us to look for open space somewhere else. But4.______ of the other planets in our solar system are capable of supporting life at present. One possible solution5.______ the problem, 6._________, has recently been suggested by an American scientist, Professor Carl Sagan. Sagan believes 7._______ before the Earth’s resources are 8._______(complete) exhausted it will be possible to change the atmosphere of Venus and therefore create a

new world almost as large as the Earth9. .The difficulty is that Venus is much hotter than the Earth. 10.________, there is only a tiny amount of water there.

Answer 1

1.left

2.will have used

3.it

4.none

5.to

6.however

7.that

8.completely

9.itself

10.Besides/Moreover/Furthermore.

【解析】

试题分析：文章大意：如果地球上的人口仍以当前的增长率增长的话，最终地球上将没有足够的资源供给生命生长。面对人口急剧地增长，资源日益地短缺的困境，可能的途径就是其他星球寻找空间，比如金星。

1.

2. have used.考查将来完成时。由时间状语by the middle of the 21st century可知要用将来完成时态。

3. it +adj “使…处于…状态”。

4. none of“没有一个”

5. solution to“…的解决办法”，注意to在这是介词。

6.

7.

8.

9. Earth itself.

10.

考点:考查对语法掌握和篇章理解能力