单项选择题

I then listened to the boy （） the lesson written on the blackboard.

A. read
B. reading
C. to read
D. having read

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（） pretty late, we decided to leave at once, as we didn’t want to risk missing the last bus.

A. It being
B. Being
C. As is being
D. It was being
单项选择题
It was essential that all the necessary documents （） in to the personnel office.

A. hand
B. be handed
C. are to hand
D. must he handed
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