—It’s good to see you again.—Yes. I keep all the letters you wrote to me over the years.

问题补充：

—It’s good to see you again.

—Yes. I keep all the letters you wrote to me over the years.

A. who

B. that

C. when

D. where

答案：

A. who

(答案→)B. that

C. when

D. where

解析：考查定语从句。句中先行词为all the letters，在从句指作宾语，故用关系词which、that或省略。句意：——再次见到你真是太好了。——是的，我保存了这么多年来你写给我的所有的信。故B正确。