It’s time to go home, let’s go.—Please _________ the light when you leave the classroom.

Look，so many passengers__________ with their smart phones on the underground．

There are several new events to the program for the 2008 Beijing Olympic Cames[ ]

Look !The telephone is broken .Someone damaged it ______purpose.–That may be right. But perhaps it was broken ________ accident.

had great difficulty _____the suitable food on the menu in that restaurant.