"age; years old" Practice Chinese lesson

Recording	English	Chinese	Status
	age; years old	岁
	He started school at the age of five.	他五岁就开始上学。
	I got diagnosed with lactose intolerance when I was 15 years old.	我 15 岁时被诊断出患有乳糖不耐症。
	Sophia is a twelve year old girl.	索菲亚是一个十二岁的女孩。