综合填空(用所给单词的适当形式填空。每词限用一次)

   Amy is thirteen. She comes from ____ . She’s in China with her ____ now. She’s a student in No.2 High School. She likes her school and all of her ____ . She thinks they’re very ____ to her. She likes Chinese, too. But she can’t ____  Chinese very well. Amy____ up very early every morning. She____  some milk and bread for breakfast. And she goes to school ____ bike.  She is never late.
   In the evening, she does____  homework and reads newspapers. She goes to bed at nine. She’s very____ every day.

电荷的定向移动形成电流．在物理学中我们把单位时间内通过某一横截面的电量Q定义为电流强度，即I=$\frac{Q}{t}$．如图所示在横截面积为S的金属导体中，若单位体积内有n个自由电荷，每个自由电荷的电量为e，当它们以速度v定向移动时，试推导导体中电流强度的表达式．

果园摘了750个桃子，每个袋子能装25个，需要多少个袋子来装?

人与人之间难免会有矛盾，表达不满会伤害对方，所以沉默是最好的办法。（    ）  

“要爱惜自己青春！世界上没有再比青春更美好的了，没有再比青春更珍贵的了。”高尔基的这段话告诉我们，青春是人一生中最有意义的时光。下列关于青春的叙述正确的是（  ）
①青春时节，是人生的春天，是孕育理想、确立志向的最佳时期
②青春使我们能够尽情的享受人生竞赛的乐趣
③青春时节，朝气蓬勃，斗志昂扬，是充满激情活力的美好时光
④青春让我们坦然的接纳欢喜与忧愁