选择括号中所给词的正确形式填空。
People can't live ______ (if no, without) water.
The young man noticed a little boy ______ (tried, trying) to hide in a dark corner.
The young man just went on ______ (teach, teaching).
He had no idea ______ (how could teach, how to teach) these ragged children.
There was one thing ______ (that, what) he could do though. He could teach in a Ragged school.
The children were barefooted, and ran up and down the narrow streets, ______ (shout and laugh, shouting and laughing).
These two ______ (man, men) are bus drivers.
Jim is the ______ (good, best) pupil in his class.
May I take a message for ______ (he, him)?
Mary is the ______ (young, youngest) in her family.