—He got his first book published.It turned out to be a bestseller.—When was ?— was in 2000

问题补充：

—He got his first book published.It turned out to be a bestseller.

—When was ?

— was in 2000 when he was still in college.

A. that;This

B. this;It

C. it;This

D. that;It

答案：

A. that;This

B. this;It

C. it;This

(答案→)D. that;It

解析：that用于指代在前面刚提到的东西或事情。that在这个句子中指上文中的He got his first book published. It turned out to be a bestseller.这件事。it指代上文所提事物的本身。