问题
选择题
Today,we’ll discuss a number of cases ________ beginners of learning English fail to use the language properly.
A.which
B.as
C.why
D.where
答案
D
解析 此句中cases表示“情况”,这里where相当于in which,在从句中作状语。当先行词为case,stage,point等,且从句中不缺主要成分时,常用where引导定语从句,在句中作状语。