用所给单词的适当形式填空 。  

1. It was Sunday and he felt kind of            (relax) at home.    

2.              (spend) time with friends is enjoyable.    

3. They made plans             (travel) to Hong Kong next year.    

4. It's very exciting             (play) such a game.    

5. I don't know if she           (come). If she (come), I             (tell) you.    

6. My teacher went out without            (say) any words.

当显示仪表不显示时，以下排除方法正确的是（）。

A、检查已经表面是否破损

B、检查是否传感器损坏

C、检查保险丝是否损坏

D、检查显示屏幕