根据句意，用所给单词的适当形式填空。
【小题1】You are _____ (waste) the time trying to explain it to him.
【小题2】The exhaust fumes(废气)_____(pollute)our city since five years ago.
【小题3】Our factory _____(produce)ten thousand machines last year.
【小题4】I can’t_____ (bear)you. Please go out!
【小题5】Noise is _____(harm) to our hearing.