单项选择题

--Why did you come so late--the bus was crowded. We ______ waiting for half an hour.

A．were kept
B．kept
C．have kept
D．had kept
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单项选择题
--I fell off my bicycle and broke my leg yesterday.--Is that ______ you drank too much
A．why
B．how
C．because
D．when
单项选择题
We must think of the ______ of the disabled when we organize an activity
A．worries
B．needs
C．dreams
D．number
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