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

试题分析：all所有的，指三个及三个以上都；none一个也没有；both两者都；neither两者都不。句意：我不得不全买了这些书，因为我不知道哪一本是最好的。结合语境可知本句中指的是三个或者三个以上，故选A。