我们做有正义感的人，应该做到（    ）

①对正义的事情能够采用正当方式奋起抗争

②对非正义的事情眼不见为净

③明辨正义与非正义行为

④能够见义勇为，匡扶正义

    My name is Leo. I am eight years old. I am 1 the UK. I like 2 model aeroplanes. I want to be a pilot. I 3 to fly an aeroplane.

    There are six people in my family. My parents are both 4. I have two brothers, John and Jack. They are both students at middle school. John is good at 5. He wants to help people at sea in the future. Jack paints very 6. He wants to be a painter. I have a sister too. Her name is Daisy. She likes 7 and dancing Very much. She 8 to be a singer.

设f（x）=$\left\{\begin{array}{c}1-\sqrt{x},x\ge 0\\ 2^x,x<0\end{array}\right.$，则f（f（﹣2））=（　　）