单项选择题

How do you account for your absence from the class last Thursday

A．explain
B．examine
C．choose
D．expand
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单项选择题
I wonder what your aim in life is.
A．attitude
B．symbol
C．goal
D．action
单项选择题
Hundreds of cyclists assembled in Central Park in Pudong this morning to take part in the event.
A．appeared
B．walked
C．met
D．combined
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