题目内容：

根据句意，首字母和汉语提示填写单词。（5分）

1.---Where is your English book? ---Sorry, I don't             （知道）.

2.My keys are on the               （收音机）, under the tapes.

3.Your books are everywhere. They're not t                   .

4.It is d              . I can not do it.

5.C              on, Jack. Let's play sports.