Tom who is always shy in public has made some friends at school has pleased his parent

问题补充：

Tom, who is always shy in public, has made some friends at school, has pleased his parents.

A. who

B. where

C. that

D. which

答案：

A. who

B. where

C. that

(答案→)D. which

解析：定语从句考查题。先行词为整个主句关系词which在从句中作主语。句意：在公共场合害羞的汤姆在学校交了许多朋友这使得他的父母很高兴。