1.how kind the children are!
（What）（kind）children they are!
2、Zhang Hua is 25 years old.
zhuang hua is(a)(25-year-old)man.
4、sandy could swim at the age of 7?
(Could)sandy(swim)at the age of7?
5.zhuang hua was in hospital for two months.
(How)(long)was zhuang hua in hospial?