构成我国地形的骨架是纵横交织的（      ）

我觉得课文中的父亲了不起，因为____；儿子也了不起，因为____。

①是法律要求做的          ②是法律提倡和鼓励的

③有利于弘扬社会主义道德  ④自觉履行了道德义务

阅读下面材料， 在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

    Jenny began to go to school when she was at the age of six. She liked her ____ (one) day very much. Her teacher, Miss Black, ____ (be) very nice, too.

    At the end of the second day, the other children ____ (leave) the classroom after school but Jenny stayed behind and waited. At first, Miss Black had some work to do and ____ (not) see Jenny, but then she looked up and saw her.

    "Why not go with the ____ (other), Jenny?" she asked her kindly. "Do you want ____ (ask) me any questions?"

    "Yes. Miss Black," Jenny said.

    "____ is it?" Miss Black asked.

    "What did I do in school today?" Jenny said.

    Miss Black laughed. "What did you do in school today?" she said. "Why did you ask ____ (I) that, Jenny?"

    "____ I'm going home now," Jenny answered, "and my mother ____ (would) ask me."