根据句意，写出括号内所给单词的适当形式。
1. At present people like to eat _________(health) food and do more exercise.
2. The three _________(spaceman) of the spaceship were warmly welcomed in Hongkong.
3. He has had a bad toothache. He must be at the _________(dentist) at the moment.
4. Daniel's mother has devoted _________(she) to the teaching of Home Economics.
5.He is very happy because tomorrow is his _________(九十) birthday
