一、根据句意和汉语注释，写出单词的正确形式

1. The heavy rain will (引起) many big problems.

三、完成句子

1. 我们的环境正在恶化。

8. They will find it useful (learn) English if they travel abroad a lot.

4. Look!Someone (clean) the room. How clean it is now!

2. It's (明智的) of you to check your bag after you get on the train.

5. What fun they had (play) football outside just now!

5. (2013 包头) The students are supposed (应该) to be quiet before the papers (分发) .

4. (2013 襄阳) 一What did the visitor say to you just now?

  一He asked me in Xiangyang since 2000 (我是否为巨大变化而感到自豪) .

3. (2013乌鲁木齐) 中国最年轻的城市三沙市建立于2012年6月21日。

Sansha,the youngest city of China,   up on June 21st,2012.

2. (2013福州) 你的电脑出什么问题了？(matter)