Thereare20questionson　this　paper,

問題詳情：

There are 20 questions on 　this 　paper, _____ has only one correct answer.                                                    

A. which             Ｂ. each of them  Ｃ. each of which 　　D. they each

【回答】

C

知識點：複合句

題型：選擇題