Question

--Happy birthday! -- Thank you! It’s the best present I _____ for. A. should have wished B.

--Happy birthday!
-- Thank you! It’s the best present I _____ for.
A. should have wished B. must have wished.
C. may have wished D. could have wished

Answer 1

could have done有两个意思：1）本可以做而没有做 如：YOu could have turned to me for help, but you didn't. 2).could 可以表示可能性 如：Don't worry--they could have just forgotten to phone.别担心，他们可能只是忘了打电话而已。
本题中倾向于第二个意思，这可能是我能想到的最好的礼物了！

Answer 2

选D 因为是过去想的，收到礼物前，所以C不考虑。
A should have done是应该怎么样。