---- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.---- Oh, dear! She _______ a lot of difficulties!
#89850
A
may go through
B
might go through
C
ought to have gone through
D
must have gone through
推荐题目
_______ there yesterday, I could have asked him not to do so.
#87615
A
If I were
B
If I was
C
Had I been
D
Was I
You didn’t let me drive. If we ____ in turn, you ____ so tired.
#87376
A
drove…didn’t get
B
had driven…wouldn’t have got
C
drove…wouldn’t get
D
were driving…wouldn’t get
 When he saw all his books _____ here and there on the floor, he knew that something terrible _____. 
#88903
A
lying; must have happened
B
lie; must happen
C
lay; might have happened
D
had lain; could have happen
If it   for your help,we would be in serious trouble.
#88964
A
isn’t
B
aren’t
C
hasn’t been
D
weren’t