用所给词的适当形式填空。

1. Our teacher makes _____ (we) very tired.  

2. Do you want _____(go) to the park?        

3. Tommy is three _______ (year) old.  

4. Where does your friend ______ (come) from?  

5. She _______ (live) in Mexico City.  

6. Please write and tell me about _______ (you).

7. Tom and David are good _________ (friend).

8. _________ (not talk) in class.

关于双波纹管差压计停用的说法不正确的是：（）

A、开关表门、抬起笔杆，动作要轻缓，不得发生碰撞

B、停差压计必须先开平衡阀，然后才动其他操作

C、抬起记录笔杆时，应使用抬笔架

D、开关差压计高、低阀时必须单手同时操作