--- How many of you have solved the math problem?--- ________, the math problem is far too difficult for us to work out. .
Don’t worry. He is __________ to take care of little Betty.
the teachers in their school is about 200 and most of them are teachers.
----She didn’t come to school yesterday, did she? ---- ___________, though she was not feeling very well.
I will come back to see you next week if I am free.
It’s almost eight years we saw each other last time.