根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

Dear Mike,

    How are you? I have a good time at my new 1 in Beijing, China. Here, I'm good 2 my teachers and classmates. They all like me and I also like 3. At school my favorite 4 are Chinese and music. And I 5 two clubs, the Chinese club and the music club. In the music club, I have a good friend. Her 6 is Yang Peiyi. She likes music. She 7 well. She can also play the piano and the violin. She says she wants to be a 8. Yang Peiyi likes 9, too. On weekends she often plays tennis or ping-pong with me. Do you want to know her? Look! Here is a 10 of her. I think you'll like her.

                                                                                                                                                                       Yours,

                                                                                                                                                                       Maria

如图，抛物线y=ax²+bx+1与直线y=﹣ax+c相交于坐标轴上点A（﹣3，0），C（0，1）两点．

19世纪末20世纪初，使人类社会面临战争危机的是（　　）

问题4：用一根长22cm的铁丝：

关于"知耻"的说法错误的是（  ）