用所给的单词的适当形式填空。

1. Can you________(help) me with my math?

2. please_________(stay) on the sidewalk.

3. _______ (not cross) the street now.

4. Let’s________ (sing) this song together.

5. Be careful! A car______ (come).

6. I like ______(stay) at home on Sundays.

7. You can_______(go) along this road until you reach the end.

8. Let the old_________(sit) down first.