(2013·安徽省芜湖三校一模)A recent study has found that the number of smokers ________ sha

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(2013·安徽省芜湖三校一模)A recent study has found that the number of smokers ________ sharply over the past five years.

A．is increasing

B．are increasing

C．has been increasing

D．have been increasing

上一题下一题 0.64难度单项选择更新时间:2014-03-28 11:36:13

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