The chairman thought necessary to invite Professor Smith to speak at the meeting .
Our country sent up Shenzhou V successfully, ____ was reported in the newspaper.
I thought ____ no use talking with him. _____ was a waste of time.
Why don’t you bring ______ to his attention that you are too busy to do it?
. The temperature can fall to –50°._____ is, 50°below freezing point.
She likes to use words ____ is clear to him.