Question

How will our continuously growing population affect our way of life, our environment, even our planet? No matter how you look at it, we will face 1.extremely serious problem. By the middle of the 21st century, we 2.(use) up all the oil that drives our cars if at the rate we’re going. Even if scientists develop some new 3.(way)of feeding the human race, the crowded conditions on the earth will make 4.necessary for us to look for open space somewhere else. But none of the planets in our solar system are able 5.(support) life at present. One possible solution 6.the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan. His idea is 7.before the earth’s resources are almost exhausted, it will be 8.(total)possible to change the atmosphere of Venus（金星）and so create a new world almost as large as earth itself.

However, 9.his idea is turned into reality, humans have a long way to go. On the one hand, Venus is much 10.(hot)than the earth; on the other hand, there is only a tiny amount of water there.

Answer

1.an

2.will have used

3.ways

4.it

5.to support

6.to

7.that

8.totally

9.before

10.hotter

【解析】本篇主要讲述了关于人口增加的问题，地球上人口的不断增多，对我们的生活，环境，地球都造成了影响；随着人口问题不断发展，我们地球资源不断消耗，有科学家提出开发金星。

1.考查冠词。句子成分完整，宾语problem是单数，所以前面要加冠词，“extremely”是元音开头，所以应该填an。

2.考查将来完成时 由“By the middle of the 21th.”可知，用完成时态，由因为是发生在将来的，所以应用将来完成时，故填wil have used。

3.考查名词单复数。some后加名词复数形式；所以way后要加“s”，故填ways。

4.考查固定句式。make it +形容词+to do sth.,使做某事怎么样。所以填it。

5.考查to do不定式。be able to do sth. 能够做某事；故填to support。

6.考查固定搭配。a/the solution to the problem解决问题的办法。故填to。

7.考查表语从语句。is后面是表语从句，表语从句中部缺少成分。故填that。

8.考查副词。副词修饰形容词，totally修饰后面的possible。故填totally。

9. 考查时间状语从句 根据句子意思，应该是在他的想法变成现实之前，人们还有很长一段时间要走；所以填before。

10.考查比较级。后面有than，所以应该是比较级，hot的比较级是hotter。