求救,一道英语题
It is _____great fun to see the students _____different ages sitting in the same class. A. /,in B./,of C.a,in D. a,of
B.fun不可数,不加冠词; of ages固定短语,各个年龄之意.
应该选B. 句中fun是不可数名词意思是"有趣";__(of)different ages 是属于of+形容词+名词的一种常用固定结构.句中短语的意思是"不同年龄的学生".
答:C是答案.用排除法: that不用在非限制定语从句;it不能做关系代词; what用在名词性从句,不做关系代词用在定语从句.详情>>