问题

r Robert has gone to HarvardUniversity for his master’s degree. — Oh, how nice! Do you know when he ____
A:was leaving
B:left
C:had left
D:has left
B:left
C:had left
D:has left
正确答案是:
同类题型
I failed the exam ________ I did my best. But I’ll try harder next time.
. He __________ full marks, but he was so careless as to make a spelling mistake.
_______ he said in the wedding ceremony moved everyone present.
Tom hardly had time for concerts at that time, ____
It’s so late. Our son______ be back!— Don’t worry. I dare say he ______ have some extra work to do.