单项选择题

Many people proposed that a national committee be formed to discuss ______ to existing mass transit systems.

A．substitutes
B．measures
C．duplicates
D．alternatives
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单项选择题
A ______ of soap and two brightly colored towels were left beside the bath, the women smiled politely at Nicole and withdrew carefully form the room.
A．loaf
B．bar
C．stick
D．block
单项选择题
Of the 1,200 million people who call themselves Chinese, ______ a very small number speak what is referred to as standard Chinese.
A．none but
B．but for
C．all but
D．but then
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