第9题: [单项选择]It is a legal ______ for parents to ensure that their children are provided with efficient education suitable to their age. A. sympathy B. obligation C. impulse D. influence 参考答案:B 答案解析:句意:父母有法律义务确保孩子受到良好的适龄教育。obligation此处作“义务,责任”讲;而impulse意为“冲动,刺激”;influence意为“影响,感化”;而sympathy作“同情,同情心