问题补充:
A good friend is a person who you can in your hour of need.
A. turn on
B. turn off
C. turn down
D. turn to
答案:
A. turn on
B. turn off
C. turn down
(答案→)D. turn to
解析:词义辨析题。A. turn on 打开 B. turn off 关掉 C. turn down 调低D. turn to 求助于句意:好朋友就是在你需要的时候你可以求助的人。根据语境选D