Question

(2013·安徽省蕪湖三校一模)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

 

Answer 1

C

【解析】選C　考查時態和主謂一致。句意：最近一項研究表明，在過去五年里，吸煙者人數急劇上升。the number of后接復數名詞作主語，謂語動詞則用第三人稱單數；時間狀語over the past five years表明用現在完成進行時。