题目内容：

You don’t have to buy______.The book with red cover is just the same as the one with yellow cover.
A.all B.both C.either D.any

优质解答

选B
You don’t have to buy【both】 . The book with red cover is just the same as the one with yellow cover
你没有必要两个都买.红色封面的那本书和黄色封面那本是一样的.both 用于两者,all用于三者或三者以上.