Thenumberofsmokers,　　　isreported,hasdroppedby17percent...

問題詳情：

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

A. it　　　  B. which　　　    C. what　          D. as

【回答】

D

知識點：複合句

題型：選擇題