题目内容：

语法填空

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

Lily: Hi, Dave. Do you think the weather is fine today?

Dave: Yeah. And the air is also clearer than ever before.

Lily: En, the newspaper reports that the air is less and less   1.  (pollute) these days.

Dave: That’s true. Fewer and fewer people 2. (drive) cars to work since the government started the traffic control two months ago.

Lily: But the control is going to end   3. two weeks. What will happen then? Are cars coming back to the road?

Dave: That’s true, too, although we all hope   4.  will never end. On the other hand, the traffic control has made things tough for people driving cars.

Lily: But it’s worth the trouble. I believe clean air is   5.  most important thing.

Dave: However, many people don’t think so. 6.  they can’t drive cars they will even have   7.  (difficult) getting to work.

Lily: They can choose to take a bus   8.  the subway. And they can even ride a bicycle. There are many other ways to choose from, actually.

Dave: Some people think buses are too crowded and riding a bicycle seems very 9.  (tire).

Lily: Anyway, it’s still   10. (well) than being trapped in a traffic jam under grey clouds and in dirty air.