下列各句中，划线的成语使用恰当的一项是（    ）

如图1，在Rt△ABC中，∠ACB=90°，AC=BC，在斜边AB上取一点D，过点D作DE//BC，交AC于点E．现将△ADE绕点A旋转一定角度到如图2所示的位置（点D在△ABC的内部），使得∠ABD+∠ACD=90°．

大力发扬“五千精神”即“千辛万苦”去创业、“千方百计”来经营、“千家万户”搞生产、“千山万水”找市场、“千条万绪”抓根 本，是浙江经济迅速发展的重要原因。这表明( )

作为“正版”的模仿，“山寨”手机、“山寨”小品、“山寨”明星等层出不穷，已演变为一种文化现象。对“山寨”现象，社会褒贬不一。有人认为，“山寨”现象深深地打上了“草根”创新、群众智慧的烙印。也有人认为，“山寨”文化其实是盗版文化、侵权文化，盗取他人的知识产权，经过组装、拼凑、换版、贴牌，俨然正版，充斥市场，成为某些消费者的新宠。
“山寨”流行现象说明了（）
①它是一种复杂的社会文化现象②它是一定时期社会的经济、文化、心理的综合反映 ③它的发生，既有商业运作的背景，也有从众心理的推动 ④凡是流行事物都是好的

    Mr. Henry has a son. His name is Billy. Billy likes playing games and doesn't like studying. When he can't do homework, he often asks his mother. But Mrs. Henry can't do it, either. She asks Mr. Henry to do all the homework for Billy every day. Mrs. Henry says she will do all the housework when Mr. Henry helps Billy to do the homework. And Mr. Henry doesn't need to any housework. So Mr. Henry is always willing to help his son to do the homework.

    It is Sunday today. Mr. Henry has a lot of clothes to wash. Mr. Henry hates to do washing. So he asks his son, “Do you have any homework to do, Billy? Let me help you!”

  “No, today is my lucky day. I don't have any homework today. ” Billy says happily.

  “Bad luck! Today is my not my lucky day.” says Mr. Henry. “I have to wash the clothes today!”

根据短文内容，选择正确答案。