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二、根据提示填单词。
1.Our environment is badly ______________(污染)。
2.The river _____________(曾经)be clean, but now it’s very dirty, even the __________(底部)of the river is full of ____________(垃圾)。
3.As students, it’s our duty to _______________________(保护环境)。
4.____________(黑烟)from the factories rise into the sky, we can hardly see blue sky now.
5.___________________________ (保护环境) can begin with small things.
6.Everyone should play a part in __________________(拯救地球)。
7.Our actions can _________________(有所作为)。
protect
environment
pollution
throw
litter
smoke
factory
simple
wooden
plastic
take action
make a difference
turn off
napkin
polluted
used to
bottom
litter
protect the environment
Black smoke
Protecting the environment
saving the earth