问题补充：
— What bad weather !It rained again .
— Yeah, when you walk to school .
A. mind you head
B. Keep of the grass
C. Watch your step
D. Be quiet
答案：
A. mind you head
B. Keep of the grass
(答案→)C. Watch your step
D. Be quiet
解析：句意为：---这鬼天气，又下雨了。---是啊，上学时小心脚下的路。mind you head ：留神你的头，Keep of the grass：勿踩草地，Watch your step;注意脚下，Be quiet：安静 。结合语境可知应选C。
