单项选择题

By the end of the trip, Mary （） more than 3,000 miles.

A．traveled
B．will have traveled
C．have been traveled
D．have been traveling

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单项选择题

A．that
B．it
C．too
D．very

单项选择题

A．will be
B．had been
C．have been
D．has been

单项选择题

A．should a communist place
B．a communist should place
C．a communist place
D．does a communist place