You should listen carefullyYou can"t arrive late for classYou may close the window You can"t run in the hallwaysYou can"t smoke here
问题描述：
You should listen carefully
You can"t arrive late for class
You may close the window
You can"t run in the hallways
You can"t smoke here
答
Listen carefully
Don't arrive late for class
Close the window
Don't run in the hallways
Don't smoke here