如何加强听力水平啊？？

Obviulsy, talk to another person in English. Practice as often as you can. English is a skill and need time to exercise it.

I recommend you to watch CCTV English news broadcast.

Actually, if your TV can pick up cable TV BBC or Hong Kong English channels or ESPN, you can watch that too.

Watch the announcers while they speak.
Watch how the announcers mouth movement and pronouncate the sound.