题目内容：

The books were so popular that they ________ out in a few hours.
A.sold
B.were sold
C.would sell
D.had sold

优质解答

同学,很高兴回答你的问题
正确答案：选B.were sold
即：The books were so popular that they were sold out in a few hours.
翻译：这些书非常受欢迎,在几小时内就售完了.
解析：书应该是被售完,应该用被动语态,所以选B.虽然sell 有主动表被动的用法,但是应该是这样的,如
The book Harry Poter sells well.哈利.波特这本书销量很好.
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