单项选择题

The boss sent Mr. Black to China on business because _________.

A．Mr. Black had never been to China before
B．Mr. Black was an able and hardworking man
C．Mr. Black could buy something interesting for Tony
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单项选择题
A．arriveB．goC．sing
A．arrive
B．go
C．sing
单项选择题
Mr. Black returned to London _________.
A．by train
B．by ship
C．by plane
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