—You should be careful when _______.—Yes, I will. I’d like to know when ________ to have a rest.
---Remember to turn off the lights before leaving the classroom, children.--- .
Why_______ to ask your friends to have dinner in Meiyuan Restaurant?
Mr Zhang is always ________ others. People all like him very much.
There are three______ workers in this factory. My brother is in it ,too.
"Take this medicine(吃药) and it will make your son better soon," the nurse says to the sick boy’s mother.