单项选择题

He often stopped at the sound of his own steps and was afraid to look ______ his shoulder.

A．over
B．back
C．round
D．beyond
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单项选择题
I noticed that the meals were well ______ what was charged for them.
A．worthwhile
B．worthy of
C．worth
D．worthy
单项选择题
He has ______ various adventures.
A．passed for
B．passed through
C．passed away
D．passed down
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