45.Speaker A：Is there anything I can do for you？

　　Speaker B：_______ ,there is something.

　　A.No,nothing

　　B.Well,now that you ask

　　C.Nothing I can think of

　　D.If you ask me

　　46.Tina：Mmm……… This is the best pudding I've ever had！

　　Lyle： ________ I know you'd like it.

　　A.What did I say？

　　B.Didn't I tell you？

　　C.Did I say it right？

　　D.Is what I said right？

　　47.Speaker A：Sorry about all the inconvenience.

　　Speaker B：____________.

　　A.OK.With great pleasure

　　B.Don't worry about it

　　C.Oh,really.That's OK

　　D.I'm sorry to hear that

　　48.Speaker A：Want to come over Thursday for supper？

　　Speaker B： _______.

　　A.I really can't.You'll not mind,I think

　　B.Let's put it off till later

　　C.No,I don't want to

　　D.Thanks,but I have to work that evening

　　49.Speaker A：We've made an appointment with the students.We'll meet at 7 in the morning.

　　Can you come on time？

　　Speaker B：I'm afraid,__________.It's too early.

　　A.I can't make it

　　B.I can't do it

　　C.I can't get it

　　D.I can't achieve it

　　50.Speaker A：I'm seventy_eight,but I never stop jogging every evening.

　　Speaker B：You're seventy-eight？No kidding._________.

　　A.You certainly don't look it.

　　B.You certainly don't look like it.

　　C.You certainly don't look at it.

　　D.You certainly don't look into it.