如图，直线l₁：y＝x+1与直线l₂：y＝mx+n相交于点P（1，b）．①求b的值；②不解关于x，y的方程组 $\left\{\begin{array}{c}y=x+1\\ y=mx+n\end{array}\right.$ ，请你直接写出它的解；

③直线l₃：y=nx+m是否也经过点P？请说明理由．

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

What kind of structure is the sentence “The girl showed her classmates some of her family photos.”?

下列漫画最能反映全球气候变化的是（　　）