单项选择题


A．Not by check.
B．By credit card.
C．Immediately.
D．In cash.
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单项选择题
What is the recent important development observed in developing countries
A．The number of smokers has been falling 2 percent a year.
B．The number of smokers has been rising 20 percent a year.
C．The number of smokers has been rising 2 percent a year.
D．The number of smokers has bean falling 20 percent a year.
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