—He got his first book published. It turned out to be a bestseller.—When was ?— was in 200

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：句意：他的第一本书出版了。结果非常畅销。那是什么时候的事？是2000年他还在上大学时。说的是过去的事，所以用that而不是this; was in 2000 when he was still in college.是强调句型，补充完整是 was in 2000 when he was still in college that he got his first book published.所以用it。选D。