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问题: I ___ my son ___ a doctor, but he wasn't good at science.

A.hoped,would become
B.had hoped,would become
C.had hoped,would have become

key B
选A为什么不行?B前面是过去完成时,后面为什么是一般过去时?

解答:

这里是虚拟的,因为后面一句他不善于科学,所以当医生是不可能的,要用虚拟
第一个空是过去的,退一步,所以是过完,第二个空是指将来的,所以用过去时