单项选择题 听力原文：W: How is Helen's experiment coming along?M: I'm not sure. Why don't we go to have a look?Q: What does the man mean?(17)A．He doesn't expect to meet her at the seashore.B．He wants to know when she's coming.C．He wants to see how her experiment is progressing.D．He isn't interested in watching her.

单项选择题 听力原文：M: Do you think Professor Paul will cancel class because of the special conference?W: Not likely.Q: What does the woman mean?(18)A．She doesn't like the professor very much.B．She doubts class will be canceled.C．She doesn't want to attend the conference.D．She wonders whether the professor is an accountant.

单项选择题 听力原文：W: Let's drop by the pest office again, Jack, and see if there is any mail yet.M: The post office again? It's only been an hour.Q: What does Jack mean?(19)A．The mail was sent back to the post office.B．He doesn't have anything to drop in the mailbox.C．It's too soon to go hack there.D．The post office is closed for an hour.