He started to learn English in 1990 and in the years he kept on using it in his work.A. f

问题补充：

He started to learn English in 1990 and in the years he kept on using it in his work.

A. following

B. followed

C. follow

D. that followed

答案：

A. following

B. followed

C. follow

(答案→)D. that followed

解析：本题考查定语从句。that followed是一个定语从句。如果用following,则应该说in the following years.故选D。