单项选择题

Was it in 1969 （） the American astronauts succeeded in landing on the moon

A．that
B．ever since
C．when
D．of which

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单项选择题

Ann thought the plane（）by the time he arrived.

A．was leaving
B．left
C．would have left
D．would be leaving

单项选择题

If he had not missed the train, he（）here by then.

A．might get
B．got
C．might have got
D．had got

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