The young teacher wants to help his students as much as he can, but ________ the other hand, he'd better help them learn on their own.
---When ______ again? ---When he ______, I’ll let you know.
The Yellow river is the second ______ river in china.
So many great events _____ that it is bound to be a most special year in history.
---Are you still working in Shanghai? ---No, I’m working in Hangzhou now. I ______ in Shanghai for three years.
The discussion ______ at tomorrow’s meeting is very important.