1. (2020七上·柯桥期中) 用方框中所给单词的适当形式填空，每词仅用一次（每空一词）。

sound   box    I   help   that

1. （1） Your Chinese isn't good. Let me you.
3. （2） These books are Alan's, not .
5. （3） I can't find the , where are they?
7. （4） — Let's play Ping-pong!

   — That good.

9. （5） Look there! are my pencils.