根据句意及首字母提示，补全单词。

1. Have you f_____ the cat and watered the plants?

2. Be sure to close the windows and l_____ the doors if you are the last person to leave.

3. It is my t_____ to use the bike, and you have rode it for several hours already.

4. What is the p_____ of his visit?

5. We s_____ believe that our government can keep the housing price in a proper level.

某发电厂周围的苔藓植物大量死亡可能的原因是（　　）

A．被人移走了

B．被电厂产生的二氧化硫等有毒气体毒死了

C．被某些动物吃掉了

D．电厂使周围气温升高，苔藓植物不能生存