The student asked her professor if he woul
题型:单项选择题
问题:
The student asked her professor if he would have gone on the space ship he did know earlier.
A.if he knew
B.if he knows
C.he had known
D.had he known
The student asked her professor if he would have gone on the space ship he did know earlier.
A.if he knew
B.if he knows
C.he had known
D.had he known