问题补充:
If I a million dollars, I would give it to medical research.
A. will have
B. have
C. had
D. am having
答案:
A. will have
B. have
(答案→)C. had
D. am having
解析:
这题考查if的非真实条件句的用法,如果和事实不符合,if条件句和主句要用虚拟语气,和现在的事实相反,if条件句用过去时,主句用would do,所以选C。句意是:如果我有1百万美元,我会把它给医学研究。