-- Youlookverytiredthismorning.Whatdidyoudolastafterno...

问题详情：

 -- You look very tired this morning. What did you do last afternoon?

 -- I did _______ Christmas shopping.

A. a number of      B. a few of       C. a lot of        D. a piece of

【回答】

C

知识点：不定代词

题型：选择题