单项选择题

Please listen carefully while others ______.

A．speak
B．speaking
C．spoken
D．spoke
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单项选择题
Hadn't the bus broken down, we ______ the train.
A．catch
B．had caught
C．could catch
D．should have caught
单项选择题
We go to the pizza parlor all the ______.
A．afternoon
B．time
C．day
D．hours
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