阅读理解
Mary, Jane and May are very good friends. Mary is shorter than May, May is heavier than Jane. Jane is thinner than Mary. How old are they? Mary is 7 years old. Jane is 12 years old and May is 9 years old. They study at Qinglan Primary School. Mary likes English, Jane likes math and May likes music. They all study hard.
根据短文内容，判断句子正（T）误（F）。
（1）There are 3 children in the story.
（2）Mary is shorter than May.
（3）Mary is heavier than Jane.
（4）Jane is the youngest.
（5）They are all good friends.