把方程x（x+2）=5（x﹣2）化成一般式，则a、b、c的值分别是（   ）

选词填空，将序号写在横线上即可。

A: Excuse me. Can you help me?

B: Of course.  ____ can I help you?

A.I am looking for a____

B:____ size do you wear?

A: Medium, I think.

B: Here. How do you like this one?

A: It's ____. Can I try it on?

B: You can try it on in the ____ over there.

—The air pollution is terrible.

— It will be worse        we take action to protect the environment.