1don't forget to switch off the lights before you
go to bed.
2 can you the heating? it's really warm.
3 you shouldn' the at night.
4 did you know your a lot
of electricity?
5 it's better to have a shower than a bath because
you don' much water.
6 you should try to the number of hours you use
the air conditioning.
7 we're trying so i always switch off my
computer when i'm not using it.​

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