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 ）
﹣Let's go swimming in the river this afternoon．
﹣We'd better not． It's ． （ danger）