单项选择题

Efficient air service has been made available through modern technology.

A．Affluent
B．Modern
C．Inexpensive
D．Effective
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单项选择题
The cars traveled 200 miles a day.
A．came
B．covered
C．gone
D．walked
单项选择题
The poet William Carlos Williams was a New Jersey physician.
A．doctor
B．professor
C．physicist
D．resident
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