Question

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

A．all

B．none

C．both

D．neither

Answer 1

A

試題分析：all所有的，指三個及三個以上都；none一個也沒有；both兩者都；neither兩者都不。句意：我不得不全買了這些書，因為我不知道哪一本是最好的。結合語境可知本句中指的是三個或者三個以上，故選A。