两个单词相加得另一个单词，并根据意义将此新单词填入下列对话中：(首字母已给出)

back　　ball　　base　　book　　note　　pack

(1)Is that your n　　　in the lost and found case?

(2)That's my b　　　. There are many books in it.

(3)I want to play b　　　with you.

—Thank you very much.

—That's my ______________.

［　　］

A． please　　　　　　　 B． happy

C． pleasure　　　　　　  D． glad

交际题

Tom: ________

Lingling: That's my father.

[　　]

That's my ________ sister.

[　　]

That's my ________ sister.

[　　]