--- The woman biologist stayed in Africa studying wild animals for 13 years befo
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(2005·江苏)
--- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
--- Oh, dear! She ________ a lot of difficulties!
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A．may go throughB．might go throughC．ought to have gone throughD．must have gone through
试题答案
答案：D