单项选择题

I need one more stamp before my collection ______.

A．had completed
B．completes
C．has been completed
D．is completed
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单项选择题
My brother ______ while he ______ his bicycle and hurt himself.
A．fell... was riding
B．fell... were riding
C．had fallen... rode
D．had fallen... was riding
单项选择题
I ______ ten minutes to decide whether I should reject the offer.
A．gave
B．was given
C．was giving
D．had given
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