依次填入下列句子中空缺处的词语恰当的一项是（    ）

①“为什么我们的学校总是培养不出杰出人才？”钱学森提出的这一艰深命题，需要整个教育界乃至社会各界共同        。

②董存瑞、雷锋、张海迪……英雄、楷模人物以其信仰、人格与壮举，将真善美         得淋漓尽致，为中学生的心灵送来了明丽的阳光，成为其崇拜的一类偶像。

③正是由于基础薄弱、违法违规生产、监管不利等原因，         了矿难事故接连不断发生的严重后果。

请阅读下面短文，根据其内容，用方框中所给单词的适当形式填空。(每个单词限用一次)

Li Wen is a 16-year-old boy. He works hard and ____  well in school. It is hard to believe that he used to have much ____ in school. His parents moved to the city to look for jobs. ____  they couldn't be at home to 1ook ____ him. From then on. he became less interested in ____to school and missed classes. Then his parents made a ____  to send him to a boarding school. He was shy and had no friends. Life there was difficult for him. One day he told his teacher he wanted to____  the school. His teacher called his parents md advised them to come back and talk with their son in person. Then his parents came back and had a talk with him. This ____changed his life. He realized that his parents would always love him and they would be ____ of everything good that he did. Now he is much____ and more outgoing than he used to be.

如图所示，实线和虚线分别表示沿 $x$ 轴传播的一列简谐横波在 $t=0$ 和 $t=0.06s$ 时刻的波形图，已知在 $t=0$ 时刻， $x=1.5m$ 处的质点向 $y$ 轴正方向运动。