用所给词的适当形式填空。

1. The family goes shopping ______ (two) a week.

2. Lucy has a ______ (stomach) today. So she goes to see the doctor.

3. Tom and Jim ______ (play) soccer on the playground now.

4. It's important to eat ______ (health) food

5. Our teacher is ______ (friend) to us.

6. Look! Nancy isn't reading. She ______ (write) a letter.

7. I am ______ (stress) out because my English isn't improving.

8. He ______ (play) the guitar every day.

9. It's a beautiful ______ (sun) day.

10. Can you stop ______ (come) here, Kate? I need your help

采煤机检修后主油泵应做什么试验？