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
Customers are well waited on in this big department store.
A．served
B．changed
C．paid
D．treated
单项选择题
People from many countries were drawn to the United States by the growing cities and industries.
A．drafted
B．transported
C．attracted
D．ordered
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