【題目】The number of smokers, ______ is reported, has dropped by 17 percent in just one year.

A. which B. as

C. that D. what

【答案】B

【解析】考查定語從句；句意為“據(jù)報道，煙民的數(shù)量在一年的時間里下降了17%”，這里是一個非限定性從句，所以排除C、D選項；which引導(dǎo)的定語從句修飾整個句子的時候，只能放在句子后面，而as引導(dǎo)的定語從句可以放在句前和句中，所以這里只有選項B符合題意，故選B.

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