如图，菱形ABCD中，对角线AC交BD于O， E是CD的中点，且OE＝2，则菱形

ABCD的周长等于____．

下列横线处应填的词语，依次正确的一项是(     )
①平时不好好学习，考试时却想取得好成绩，这无疑是        。
②随着科学技术的发展，人类的         正在不断地变为现实。
③只有抱定坚定的          ，理想才能变成现实。
④老师的鼓励使他          大增，它又自信地站到了起跑线上。

根据短文内容，判断正确还是错误。

    I'm a junior high school student. My name is Sarah. I have a pretty aunt. Her name is Jenny. She is an actress. She must be at least thirty-five years old. In spite of this, she often appears on the stage as a young girl. Jenny will have to take part in a new play soon. This time, she will be a girl of seventeen. In the play, she must appear in a bright red dress and long black stockings. Last year in another play, she had to wear short socks and a bright, orange-coloured dress. If anyone ever asks her how old she is, she always answers,“Darling, it must be terrible to be grown up!”This is my lovely aunt. I love my aunt.