单项选择题

One of the fifty states in the United States___ an island, Hawaii.

A．is
B．are
C．was
D．were
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单项选择题
The word processor _______of a keyboard, a monitor and a printer.
A．composes
B．consists
C．comprises
D．constitutes
单项选择题
______has been done to stop pollution caused by traffic.
A．Lot
B．Much
C．Few
D．None
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