Question

he left schoo forteen years old

同义句转换 When Hanhan was seventeen years old ,he left school._ _ _ _seventeen,Hanhan left school
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Answer 1

正确答案为：
When Hanhan was seventeen years old,he left school.
= (At the age of) seventeen,Hanhan left school.
韩寒十七岁时离开了学校（即：辍学）.