问题补充：
We had fun at Mary’s party last Sunday.
A. a lot of
B. a great many
C. a large number of
D. many a
答案：
(答案→)A. a lot of
B. a great many
C. a large number of
D. many a
解析：fun是不可数名词,没有复数形式,也不可加不定冠词,其后可接(in) v -ing。
fun可用于另一名词前作定语，BCD三个选项后跟可数名词。故选A。
