根据句意及汉语提示补全单词。
【小题1】He has a ________ (牙疼). And he should see a dentist.
【小题2】Tom is ill so I went to the game, _________ (代替).
【小题3】She ________ (自愿) there once a week to help kids learn to read.
【小题4】_______(根据) to the TV, tomorrow will be fine.
【小题5】I can’t ________(理解) what you said yesterday.