I.听句子，选择最佳的答语。（每小题1分，共5分）
（）1. A. No，I don’t. B. Bill has a ping-pong ball.
C. That sounds interesting.
( )2.A .Great! let’s go . B. Yes ,she does.
C. Yes, I do.
( )3.A.You’re welcome . B.No, you don’t.
C.You ,too
( )4.A.Yes, it’s mine. B.No, it’s Ben’s
C.Yes, it’s his book.
( )5.A. Under the books. B.They aren’t mine.
C.No, they’re on the bookcase.
