We should keep the classroom_____________and tidy.
The doctors did what they could _____ the dying man.
--- Where is Mr. Lee at the moment?--- He _____ chess with his neighbour, but I’m not sure.
In order _______ late, many students get up very early every morning.
We should spend ______ money solving ______ problems.
Would you please _____ the children ______ with snakes?