问题补充：
How Mike have refused such a good opportunity to go abroad for further study?
A. need
B. must
C. can
D. might
答案：
A. need
B. must
(答案→)C. can
D. might
解析：考查情态动词。Need have done本需要做某事实际上没有做;must have done一定做了某事（不用于疑问句和否定句）；can have done 可能做某事；might have done也许做某事；句意：Mike怎么可能放弃这样一个出国深造的好机会呢？
