1. 用方框中所给单词或短语的适当形式填空。

noise, welcome, truck, think about, control

1. （1） The worker can the machine very well.
3. （2） your present life. How lucky you are!
5. （3） Be careful! A is coming!
7. （4） People may feel bored in the environment.
9. （5） The guide said, "Boys and girls, to the Summer Palace. Enjoy yourselves."