---Why you are so worried? --- I ___for my little son all the afternoon, I don’t know why he hasn’t come back so late.
A good friend from _____I was born showed up at my home right before I left for Beijing.
I can’t leave. She told me that I _______ stay here until she comes back.
We should make____a rule for us that the last to leave the classroom shall turn the light off.
_______ you’ve got a chance, you might as well make full use of it.
Chongqing is larger than ________city in China.