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职称英语
The student asked her professor if he would have gone on the space ship he did k
The student asked her professor if he would have gone on the space ship he did k
游客
2023-12-31
27
管理
问题
The student asked her professor if he would have gone on the space ship
he did know
earlier.
选项
A、if he knew
B、if he knows
C、he had known
D、had he known
答案
D
解析
虚拟语气。本句是对过去事实的假设,条件从句的谓语应用过去完成时(hadknown),而if条件句中如有were,should,had,可将if省去,而把were,should,had放在句首。因此选项D是答案。
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