You look very tired this morning.what did you do yesterday afternoon?I did---------------christmas

问题描述:

You look very tired this morning.what did you do yesterday afternoon?I did---------------christmas
shopping
A.a lot of
B.a few of
C.a number of
D.a piece of
为什么选A不选C呢?

a lot of可以修饰可数和不可数名词,而a number of 只可修饰可数名词.