I had to buy of these books because I didn’t know which one was the best.A. bothB. noneC.

问题补充：

I had to buy of these books because I didn’t know which one was the best.

A. both

B. none

C. neither

D. all

答案：

A. both

(答案→)B. none

C. neither

D. all

解析：此题重点考查四个选择项的区别。either: 1.否定句中的“也”。 2.两者其中之一。neither：两者都不。特殊句式：neither…nor… both：两者都。特殊句式：both…and…

none:三者或三者以上都不。all：三者或三者以上都。