听录音，填入所缺的单词。（ 5分)
（1）A: What’s that in _________?     B: It’s a _________.
（2）A: Look at my ________.     B: They’re too_______. Try this _______ on.
（3）A: _________ water bottle is it?   B: Perhaps _________ Helen’s.
（4）A: _________ _________ father?  B: _________ in the study, I think.