---You____ part in the party on time.--- Sorry, I was delayed by the accident. A.are suppose..

---You____ part in the party on time.--- Sorry, I was delayed by the accident. A.are supposed to take B.have supposed to take C.are supposed to have taken D.supposed to take

C


试题分析:考查固定搭配以及不定式用法。固定搭配be supposed to do sth应该做某事;如果不定式的动作发生在谓语动作之前,就使用不定式的完成式来表示这个已经完成的动作。句意:—你本应该准时参加这个聚会的。—对不起,我遇见了交通堵塞。故C正确。
点评:如果不定式的动作发生在谓语动作之前,就使用不定式的完成式来表示;如果不定式的动作和谓语动词同时发生,就使用不定式的进行式。关键是要分辨清楚动作的先后关系。
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