1. 选择恰当的词填空。

How much    where      who    what    when

1. （1） —is the bike?

   —It's 50 dollars.

3. （2） —can help me?

   —I can help you.

5. （3） —are you going to have?

   —I'm going to have an apple.

7. （4） —is he going to go to bed?

   —At half past nine.

9. （5） —did she go?

   —She went to the library.