用适当的代词填空。

1．That's my schoolbag. Give _____ to _____, please.

2．A: Oh, dear! I can't find _____ bike.

      B: Don't worry. I think I can help _____. Is that bike over there _____?

3．A: Dad, we can't carry this bag. It's too heavy. Could you come and help _____?

      B: Wait a minute. I can help _____ carry it.

4．They are your new teachers. Please go and say "hello" to _____.

5．Bob is an English boy. _____ father is Mr Brown.