题目内容
He is either swimming or boating in the lake. I don’t know _____.
A. which B. what C. when D. where
A
根据句意,应该表示两个当中其中一个。
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题目内容
He is either swimming or boating in the lake. I don’t know _____.
A. which B. what C. when D. where
A
根据句意,应该表示两个当中其中一个。