如果函数$y=\left|x\right|-2$的图像与曲线$C:x^2+\lambda y^2=4$恰好有两个不同的公共点，则实数$\lambda$的取值范围是(     )

双曲线$\frac{x^2}{4}-\frac{y^2}{4}=1$的渐近线方程为（   ）

    How are you getting along with your high school? It may be hard for you as this is the first time you ____ (leave) your parents. I know that you are now having trouble ____ (communicate) with others. That's ____ you are new here and people don't know about you. But I think you can follow the advice below.

    First, you should take ____ active part in the discussions and show your own opinions about the matters, and at the same time, learn to listen to other people's views ____ (careful). Second, you should learn about your classmates' likes and dislikes, ____ can make you get familiar with them. Only in this way can you get to know more ____ (difference) people and show them that you are just as friendly. I'm always here ready to help. We can take part in some ____ (activity) together and I can introduce you to others.

    There's no need ____ (worry) too much. People will know you more very soon and will like to make friends ____ you if you can do as the above. Just remember, “God helps those who help themselves.”