27. I____ much weight in the past two months,so I think the weight-loss pills____ very well.

A. have lost; do　 B. lost; work　　 C. have lost; work　 D. lost; do

26. I don’t think the necklace is made of diamond,____?

A. do I　　　 B. do you　　　 C. isn’t it　　　 D. is it

25. -----We were not sure which way to go. In the end we turned right.　

-----You went the wrong way. You____left.

A. must have turned　　　　　　 B. must turn

C. would have turned　　　　　 　D. should have turned

24. It’s not surprising you’re tired.____ , you____up until 12 o’clock last night.　

A. At all ; worked　 B. After all; stayed　 C. After all; put　 D. First of all; turned

23. We must inform them____ any changes that we make to the plan.

A. of　　　 B.on　　　 C.with　 　　D.in

22. Next winter,____ you will spend in Harbin,will be another exciting holiday.

A. when　　 B. which　　 C. that　 　　D. where

21. Playing ____ piano for the first time is____ experience that I won’t forget.

A.a; an　　 B.the; an　　 C.the; the　　 D.a; the