英语题目急急急
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1、Factories mustn't let out dirty smoke into the air.
2、The fish are all dead because the lake has been seriously polluted.
3、Why not throw the rubbish into the dustbin?
4、We should turn off the lights when we leave the room.
1、Factories mustn't let out dirty smoke into the air.
2、The fish are all dead because the lake has been seriously polluted.
3、Why not throw the rubbish into the dustbin?
4、We should turn off the lights when we leave the room.
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