—Shall I lock the lab now before I go home?
—________.I'll check it myself later.
A．Go ahead B．No problem
C．No hurry D．Don't bother
—Can I ask you a rather personal question?
—________
A．Thanks，take it easy. B．Thanks，help yourself.
C．Of course，go ahead. D．Of course，why not?
—I had a great time in the summer holidays.We went scuba－diving in Hawaii.
—Wow！________
A．I'm going to Hawaii，too.
B．How generous you are!
C．That sounds really cool!
D．Enjoy yourself!
—Thank you very much for helping me with the luggage.
—________.
A．Don't say so B．With pleasure
C．I'd love to D．Not at all
—Do you mind if I open the window?
—________.Go ahead，please.
A．Yes B．No C．Sorry D．Of course
—What's the price of the shirt?
—Two hundred dollars.
—I'm afraid ________.
A．the money is too much B．the price is too expensive
C．the price is too high D．your offer is too dear
