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谁知道 A series of debates between the lectures____scheduled for the next weekend.
A were B are C have been D was
为什么会选D的,..
人气:473 ℃ 时间:2020-03-22 01:35:03
解答
因为 a series of 是一系列的意思,整个主语归为一个整体,是单数,所以谓语动词使用单数形式,这里面唯一一个单数形式就是D
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