english
The leaders ___ us in the discussion , but owing to more important business they couldn't come. A were to join B would like to join C intended to join D were to have joined 请说出你选择的原因,不要只告诉我答案
选D was/ were to do 表示过去曾经计划要做的事,或者过去应当做的事,而且从现在的角度来看已经实现了 而was/ were to have done, 表示 “本打算”、“本计划”或“本应当” 做的事而没有做成或没有发生 从句意看join us in the discussion 没有实现,所以选D
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