The air pollution is still terrible in North China.
It will be even worse if we don't take action to protect the e around us.
It's time to say goodbye. I hope I can you in the near future. (收到……来信)
Lots of tourists are amazed at the beauty of the in Yunnan. (蓝天)
Some in the medical research helped control the terrible illness. ( achieve )
My father stopped smoking. ( final )
Nick gave his mother a scarf on her birthday. That made her very happy. ( forty )