It was in the library ______ I met you last time. A.where B.when C.that 答案是A 但不是强调句吗?

题目

It was in the library ______ I met you last time. A.where B.when C.that 答案是A 但不是强调句吗?

答案

如果你的句子已经完整,100%选C,强调句型.
判断方法：去除it's和所填部分,句子依旧正确.
In the library I met you last time.