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，判断句子正误。对的写“T”，错的写“F”。
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