英语选择题一道

-Would you like to have a look at some pants？They may fit you well.
-Well,I'd like to try those blue______
A.pairs
B.ones
C.pair
D.pant
答案是A，B为什么不能用呢？

你说的时候肯定说
a pair of pants 吧
那就不能用ones了
ones 代那些 单个的东西 是可以的

谢谢

To be or not to be，that is a question.