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

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：第一空填that，指书的出版; 第二空填it，指时间。