John's success has nothing to do with good luck. It is years of hard work that has made him what he is today.(摘自2010湖南高考)
It is only children who make such stupid mistakes.
Is it Professor Wang who teaches you English?
What is it that you want me to do?
It was not until she took off her dark glasses that I realized she was a famous film star.
1．(2011·重庆高考)—Have you seen the film Under the
—Of course, I have.It was in our village________ it was made.
A．that B．where C．when D．which
2．(2012·宝鸡质量检测一)It was not until midnight
________ we got home because of traffic jams.
A．that B．when C．while D．as
3．(2012·孝感质量检测)I can't figure out ________ it is that
makes him so difficult at school.
A．how B．what C．why D．which
It is (was)+被强调部分+ that (who)+句子其他部分。此结构强调的成分仅限于主语、宾语和状语。
It is not only blind men who make such stupid mistakes.
It was the goat’s eyes that he had seen in the darkness.
It is from the sun that we get light and heat.
It was not until I had read your letter that I understood the true state of affairs.
原句：My father did the experiment in the lab yesterday evening.
强调主语： It was my father who did the experiment in the lab yesterday evening.
强调宾语： It was the experiment that my father did in the lab yesterday evening.
强调时间： It was yesterday evening that my father did the experiment in the lab. (注意不用when)
强调地点： It was in the lab that my father did the experiment yesterday evening.