Question

-How about the two pairs of socks?

-Em, they are very good．I’ll take ________ so that I can change sometimes．

1. A.
   both
2. B.
   all
3. C.
   either
4. D.
   neither

Answer 1

A
all指“三者以上都”；either指“两者当中任何一个”；neither为“两者当中一个没有”；both意为“两者都”。结合题意“两个都要，以便换着穿”，可知应用both。