He began taking flying lessons at the age of 15.同义句转换
问题描述：
He began taking flying lessons at the age of 15.同义句转换
同义句转换 He began____ _____flying lessons when he was 15years old.
答
He began_to___ _take____flying lessons when he was 15years old.他 在15岁时开始上飞行课程
一般情况下 begin to do sth =begin doing sth.
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