用动词的适当形式填空。

1. Tom, _____________ (not walk) on the grass.

2. The geese ____________ (catch) the fish now.

3. My grandma ____________ (watch)TV every day.

4. His parents ___________ (go) to Beijing last week.

5. We like ___________ (play) football after school.

6. Look! The girls ___________ (sing) in the hall.  

7. _________ (be) there any money in your hand?

8. Lily __________ (have) got a new dress. I ___________ (have) got one, too.

9. Tom, stop ___________ (play). You should do your homework.

一级维护的作业内容，除了日常维护的作业的内容外，以（）为主。

A.清洁、润滑、紧固

B.清洁、补给、紧固

C.清洁、紧固、调整

D.清洁、润滑、调整