I regret that I waited in the queue for a long time to buy the ticket this morni

题干

I regret that I waited in the queue for a long time to buy the ticket this morning. I ______ it online.

A．could buy	B．must buy
C．could have bought	D．must have bought

上一题下一题 0.85难度单项选择更新时间:2018-12-03 04:09:55

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