Speaker B.__________

　　A. You don't have to give me a hand.

　　B. That would be too much bother, but thanks anyway.

　　C. I'm OK. You shouldn't worry about that.

　　D. Unfortunately I feel unable to accept your offer.

　　15. W : The experiment has been completed, hasn't it?

　　M:__________

　　A. Yes. We need another week to complete it.

　　B. Yes. It has been completed beautifully.

　　C. No. It was completed last week.

　　D. No. I have no idea about it.

　　答案：1.B 2.B 3.A 4.D 5.A 6.B 7.B 8.D 9.B l0.C 11.A l2.A l3.B l4.B l5.B