Because of a similarity to dance, synchronized swimming—exhibition swimming in which the movements of one or more swimmers synchronize to a musical accompaniment—is sometimes called water ballet, especially in theatrical situations.
答案是C
为什么A不对呢?synchronize本身就是动词,为什么加Be动词?这个词就是要这么用吗?
习惯用法是be synchronized to 还是 be synchronized with?
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