The workers in HuaShan Mountains have torubbish to keep the mountains clean.

You should really _______ smoking. It’s bad for your health.

She had an advantage over others because she had a good ________ of both Chinese and English.

“I want my leg! I want to run! I want to jump!”, a girl cried in the hospital in Libya(利比亚).

Wow, so many new houses! I can’t believe that. It used to be a poor village.— Yes,_________ has changed here.