1. He likes to stay at home and help his mother do the housework on  __________ (星期天).
2. Nanjing topped the list of the happiest cities for ___________ (教育) in China in 2009.
3. Look at the children on the playground.They are flying kites ___________ (愉快地). Let's join them.
4. As people grow more green-minded ,more of them take actions to reduce ___________ (他们的)
    carbon footprints.
5. The Greenery Theme Park in Hexi New Town is a good ___________ (地方) for people to
     enjoy different plants.