①社会必要劳动时间决定商品的价值量

②电价格的大小由其在不同时段的使用价值决定

③供求关系的变化影响商品的价格变动

④人们可以运用价值规律调节经济生活

物体被毛玻璃遮住后就看不见了，其原因是物体（   ）

①男孩说：“没……我没看见。”这时，男孩在想____。

②列宁说：“多好的灰雀呀，可惜再也飞不回来了。”这时，列宁在想____。

③“一定会飞回来！”男孩肯定地说。这时，男孩在想____。

④列宁看看男孩，又看看灰雀，微笑着说：“你好！灰雀，昨天你到哪儿去了？”这时，列宁在想____。

A．我明天就把灰雀送回来。

B．我不能说我把灰雀捉走了。

C．男孩已经把灰雀送回来了，我不能问男孩，那样会伤害他的自尊心。

D．灰雀是男孩捉走的，我要用我的担心与惋惜感染男孩，让他主动送回灰雀。

阅读下面短文，用所给动词的适当形式填空，使短文完整、通顺。每空不限一词。
     Rose is one of the funniest girls in her class. She looks like a boy, and she is good at ____ (perform). So she____ (choose) to play Harry Potter by her classmates last week. She said happily, “I'm sure that I ____ ( do )the job well because I____ (see) the movie many times already.”
    Dick, one of Rose's best classmates, is also an actor in the play. He____(like) to perform the play with Rose. He said, “We are confident that we____ (do) well in our school art festival next week.”
    Mrs. Smith, their teacher, pays much attention to their play. She often____(encourage) them. Yesterday afternoon when she ____ (watch) their performance, she took photos of them. And the photos____(send) to their headteacher next month. They hope their performance ____ (be) the best.