单项选择题

This is ______ to us students on social (社会的,交际的) gatherings.

A． a useful advice
B． one of useful advises
C． useful (有用的) advice (忠告,劝告)
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单项选择题
His family was poor, He ______ drop out(退学) of school at the age of 14.
A． had to
B． must
C． have to
单项选择题
Excuse me. Is there a car ______ near here
A． parking
B． park
C． lot
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