读图，回答问题：下题
一What did you do last weekend? 一I stayed at home all weekend and slept.
____
下列选项中的数据为空气污染指数。四大城市中，空气质量最差的是( )
这些花闻起来香吗? （sweet)
I am very ____(累的) to look after two pre-school children at home.
