_____ March 28, about 20 Chinese cities turned off lights of major building for one hour. [ ]

It’s reported that ________ young ____ to be rebellious against ____ parents’ instructions nowadays.

He is playing cards _______ his friends. [ ]

I’ve shown you all the interesting and important places of our school. — Thank you for so much time.

There _____ anybody in the room. — Why do you say so? — Because the door is locked.