that ,this ,it 的用法

题目

that ,this ,it 的用法
----He got his first book published.It turned out to be a best seller.
----When was ___?
----_____was in 2000 when he was still in college.
A.that;This B.this ;It C.it; This D.that;It
第一个空为什么填that,第二个空为什么填it,是强调句式吗?

答案

第一个用that代指前文的He got hie first book published
而this通常代指后文出现的
第二个不是强调句,若是强调句的话,把it is…… that ……去掉之后,还可以是一个完整句,比如：It was my father who did the experiment in the lab yesterday evening
去掉之后是一个完整句My father did the experiment in the lab yesterday evening
而此处若去掉的换就缺少主句,it代指的是已经提过的时间time