My thinking

3: Why are the Chinese learning English ?

I think tha world become internationallity.So we need to learn English. The reason is same for Chinese. In future, English will be very inportant than now.

6: In what ways can listening to songs in English help learners?

I think music is very friendly for us. And almost people like music. So we can learn English to use music. I think it's very useful and inteligent way to learn English.