Could you let me know the reason _ his mother got so angry just now.A.why B.which C.that D.for that
问题描述：
Could you let me know the reason _ his mother got so angry just now.
A.why B.which C.that D.for that
答
A 定语从句，先行词在从句忠做原因状语，FOR后不能跟THAT
答
选A
我个人印象中，一开始学到的时候就是the reason why......：...的原因是...
这句话翻译为：
请你让我知道/告诉我/让我明白他妈妈刚才生气的原因，行吗？
答
A.why
祝好!
答
A
which或that是代词，要在从句中做主语或宾语，但从句不缺少这样的成分；for that改为for which就对了。why是个关系副词，可以引导一个定语从句。