用所给动词的适当形式填空。

1. What time ______ you _____ (get) up in the morning?

2. Oh, it's seven o'clock. It's time ________ (go) to school.

3. The box is too heavy. Let me _________ (help) you.

4. Lily _______ (have) some picture books.

5. Listen! Who _______ (sing) in the room?

6. There ______ (be) a boy and some girls over there.

7. Where ______ your friend _______ (come) from?

8. My mother _______ (wash) clothes on Sunday.

9. Classes ________ (begin) at 8:00 every day.

10. Sometimes he _______ (watch) TV in the evening.

在二维总装配工程中主视图右侧一般是左视图，而在左视图的右侧一般为（）。

A、右视图

B、前视图

C、后视图

D、仰视图