单项选择题

—()do you visit your grandparents before
—Every winter.

A．How long
B．How often
C．How soon
D．How much

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She told her neighbour that he () the well known scientist if he had attended the lecture.

A．could meet
B．might have met
C．might meet
D．would meet
单项选择题
Those guests()the front row came here from a European country early this morning.

A．who seated
B．seating
C．were sitting
D．seated
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