一道英语问题Jackwishesthathebusinessinsteadofhistorywhenhewasinuniversity.AstudiedBhadbeenstudyingCstudyDhadstudied答案是D我觉得应该是A,请四个选项都解答一下谢谢

Question

一道英语问题
Jack wishes that he ____business instead of history when he was in university.
A studied B had been studying
C study D had studied
答案是D
我觉得应该是 A,请四个选项都解答一下
谢谢

Answer 1

1.答案：D.
2.翻译：Jack希望他当初上大学时能不学历史而改修商业.
3.
1）wish引导的宾语从句必须采用虚拟语气.
2）其从句时态的使用规定如下：
如果从句动作发生在过去,则使用过去完成时；
如果从句动作发生在现在,则使用一般过去时；
如果从句动作发生在将来,则使用过去将来时.
3）此题由后面的时间状语when he was in university,可以明显看出从句动作发生在过去,所以用过去完成时.