题目内容:
--The woman biologist stayed in Africa studying wild animals for 13 years before she re-turneD.--Oh, dear! She a lot of difficulties! A.may go through
A.may go through
B.might go through
B.might go through
C.ought to have gone through
C.ought to have gone through
D.must have gone through
D.must have gone through
参考答案:
答案解析: