today,we'll discuss a number of cases_____beginners of English fail to use the language preperly.A.which B.as C.why D.where请问为什么选d啊谢了

today,we'll discuss a number of cases_____beginners of English fail to use the language preperly.A.which B.as C.why D.where请问为什么选d啊谢了
today,we'll discuss a number of cases_____
beginners of English fail to use the language preperly.
A.which B.as C.why D.where
请问为什么选d啊谢了

today,we'll discuss a number of cases_____beginners of English fail to use the language preperly.A.which B.as C.why D.where请问为什么选d啊谢了
这是定语从句,显然在这句话中CASES做先行词.
先告诉你一个规律,在做题的时候,一般会用situation, point, cases, idea等等的先行词时,都会用WHERE,这样可以一眼看出,算是小窍门吧
现在分析,
WHICH在定语从句中得做成分,或主,或宾,你再观察一下从句,并不缺成分,所以A排除
在有AS 和WHY时,它们也用于不缺成分的从句,但是,看一下意思,并没有为什么的含义,只有用D整个句子修饰限定CASES

where =prep.+which
这里where= in which
正常语序是：today,we will discuss a number of cases in which (where) bebinners of English fail to use the language preperly.
但用which缺少介词，而B,C 选项语义错误.D项正确。

后面从句不缺成份因此用关系副词,再根句语意选D

有这么几个词如CASE， POINT ，SITUATION 关系代词基本都选WHERE。
曾经的曾经，哎，我曾以为那是同位语从句，很理直气壮地选了THAT，但错了。所以，要牢记。