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为什么选C请逐项分析,

分类: 作业答案 • 2022-04-03 23:06:03

问题描述：

为什么选C请逐项分析,
-The woman biologist stayed in Africa studying wild animals for 13years before she returned.-Oh,dear!She()a lot of difficulties.
A.may go through B.might go through C.ought to have gone through D.must have gone through

答

A,B 时态不对
D must的肯定级别大于ought to(只推测)

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