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题型:单选题 题类:模拟题 难易度:普通

天津市河东区2021届高三下学期英语第二次模拟测试试卷

The biologist         a lot of difficulties while she stayed in Africa studying wild animals for 20 years.
A、may go through B、might go through C、ought to have gone through D、must have gone through
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