it was in the school ____he had studied ____he began the important experiment .

A that ;where B where ;that C where ;in which D in which ;which 选择哪一个呢？

b

第一个是定语从句,后边是强调句

选B

这是一个很容易出错的题目，因为它里面有一个定语从句，然后整个句子是强调句。

school ____he had studied，这个就是一个定语从句，先行词是school，由于he had studied是个完整的句子，然后应该是he had studied in the school，所以必须填where或者in which,所以A是错误的.然后再是第二个空，根据强调句的结构it is... that,必须填that，需要注意的，就算是强调的是地点或者时间，后面的that也不可以换成是where或者when，这个很容易出错，因此CD是错误的。当然强调人的时候可以用who来代替。把这个强调句还原成一般的句子就是：he began the important experiment in the school where(in which)he had studied

选A

It was .....that 是强调句

b

it was in the schollo where he had studied that he began the important experiment.

这是一个强调句，强调的是学校。

意思是：正是在他就读过的学校他开始的重要实践。

C where ;in which

C