问题补充：
When you are in trouble, you may your teacher and classmates for help.
A. turn away
Bturn around
C. turn back
D. turn to
答案：
A. turn away
B. turn around
C. turn back
(答案→)D. turn to
解析：考查短语辨析。turn away不理睬，turn around转身，turn back折回，turn to
sb for help ,向某人求助，句意：当你处于困境中的时候，你可以向你的老师和同学求助。故选D。
