高中英语单选（请高手进来帮帮忙！）

选D
上下句要连贯，问“你在哪找到Mr.Smith的？
A为强调句“我们经常去图书馆”所强调的是“我和Mr.Smith经常去的是图书管，而不 是别的地方”
C为定语从句“在（我们经常去的那个）图书馆（找到他的）”
which那句形就不对了，应为“it was the library which we often went to read.”也可以说“it was the library that we often went to read.”为定语从句。（注意这3句都是定语从句it was in the library where we often went to read不是地点状语从句，
You'd better make a mark where you have any questions.
You`d better make a mark at the place where you have any questions.
以上两句字意思相同，但第一个是状语从句，后一个是定语从句。定语从句有先行词THE PLACE，而状语从句没有。状语从句中where引导的句子做地点状语，不出现place.
定语从句出现先行词place，再用where引导的定语来修饰place
it was in the library where we often went to read出现了先行词library ）

不管答案是什么·IN 〔介词〕不与THAT 连用
只与其他关联代词连用

答案D 这是定语从句 LIBRARY 是先行词 后面〔Where we often went to read]是修饰它的译为：我们经常去读书的图书管。

·加油！！

这题考的是地点状语从句，修饰library。如果用which，那么前面应该加介词in。而that前不能加介词，这里只能填副词where。如果用了that，你再仔细看，就成了强调句型，而这里如果要是强调句型的话，应该是 it was in the library that i found Mr. Smith. 显然后面是where引导的地点状语从