根据课文内容填空。

某中学九年级（1）班，三位同学一天见闻如下：

见闻一：李静同学上学迟到，老师批评她，她怪自己的妈妈没有按时叫醒她。

见闻二：英语试卷发下来，周明同学得了28分，周明说：“我对英语没有什么兴趣”。

见闻三：放学后李依同学请其他同学为他值日，打扫教室及环境卫生。

选词填空。

excited, skill, may, they, without, but, include, part

    American teenagers(青少年)enjoy doing part-time jobs．They think it's an important____of growing up．They can learn some important____by doing part-time jobs and they can also make some money in this way．
    American teenagers usually begin to do part-time jobs at the age of 14．On weekdays，they____go to work a few hours a week after school．They usually work for longer at weekends．
    In summer,American teenagers are____if they find part—time jobs at camps or swimming pools．These jobs can bring____much fun．
    Some difficult jobs____teaching， nursing and police work．____these jobs can be helpful for their future．When they grow up，the students with work experience are more likely (可能的)to be successful than those____work experience．

$\sin \left(-\frac{23}{6}\mathrm{\pi }\right)$的值等于（  ）

—I have got a headache.
—No wonder.You___in front of that computer too long.