给下列句子选择合适的答语。

A．Sure. Here you are.

B．Because he can’t find his key.

C．I’m sorry to hear that.

D．Can you help me with housework?

E．Because I get a new toy car.
【小题1】Why are you so excited?（______）
【小题2】What can I do for you?（______）
【小题3】Why is Jack sad?（______）
【小题4】Would you mind passing me the water? （______）
【小题5】Tom’s computer doesn’t work. （______）