They___laughing as the movie was going on.A.were B.are C.was D.\
问题描述：
They___laughing as the movie was going on.A.were B.are C.was D.\
答
A
后半个句子中 用了 was going on 所以 发生在过去 且是 在当时某个具体的时刻（as the movie was going on）发生的因此用 过去进行时 因此是 were laughing
他们一边看电影一边哈哈大笑.
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