题目内容：

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。将答案填写在答题纸的相应位置。

The interviewer is talking to Jason about environmental problems.

A: Jason, can you tell us about some of the problems you’ve seen?

B: I think one problem is that the air is 1.__ (bad) polluted. I hardly ever see blue 2.___ (sky) anymore.

A: What do you think has caused this problem?

B: Well, there are much3.____(many) cars on the roads these days. And factories 4._____burn coal also pollute the air with a lot of black smoke.

A: What other problems do you see?

B: I guess there’s too much rubbish and waste in the streets. People are also 5.___ (litter) in public places. This is turning beautiful places 6.____ ugly ones.

A: Yeah. So what are your ideas for 7.____ (solve) these problems?

B: Well, to cut 8._____air pollution, we should take the bus or subway instead of driving. Or ride a bike. Bike riding is good for health and it doesn’t cost 9._______ (something)!

A: Great ideas! What about waste pollution?

B: I think simple things like bringing a bag to go shopping can help. And remember to throw rubbish in the bins.

A: So together, our actions can make 10.______ difference and lead to a better future!