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- I remember you were a talented pianist at college.Can you

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- I remember you were a talented pianist at college.Can you play the piano for me?
-Sorry,I ________ the piano for years.
A.don’t play
B.wasn’t playing
C.haven’t played
D.hadn’t played
— Alvin,are you coming with us?
— I'd love to,but something unexpected________.
A.has come up
B.was coming up
C.had come up
D.would come up
- I remember you were a talented pianist at college.Can you
/>C 2.A

这两题都是考现在完成时的用法,掌握现在完成时的时间关系,是说过去的动作与现在有关,也就是说必须有过去,还要有现在,否则就不能用现在完成时.
1,--我记得(过去了)在大学你是个天才钢琴家,你(现在)能为我弹钢琴吗?
    ---抱歉,我已经(从在大学到现在)好些年没弹了.所以用现在完成时.
2,--Alvin,你现在和我们一起来吗?
     ---我很乐意,但是出乎意料的事发生了.(在我还没与他们去的时候事情发生了,现在的结果是我不能去了.)