When did Mary lose her handbag? — It was at Christmas ___she lived in
问题描述：
When did Mary lose her handbag? — It was at Christmas ___she lived in
londonwith her mother.
Awhere B when C that D which
答案是B 为什么不选C
答
这是when引导的定语从句来修饰Christmas,因为Christmas是时间,所以必须用when为什么不是强调句？如果你把答句变为强调句就成了It was at Christmas that she lived in London with her mother.了这句话表达的意思逻辑上没问题，但是你看看能不能作为问题的答句了？这就成了：她是在圣诞节的时候和她母亲住在伦敦了。肯定就答非所问了。