If we cut down lots of trees, ____ oxygen will be ____. If you ____ ____ the light when you leave the room, you won’t waste energy. If people don’t use ____ bags, they will ____ less litter. If you ____ ____ the light when you leave the room, you ____ waste energy. If you ____ use the sat-nav you ____ find the street. If mum ____ home in time, we ____ ____ lunch together. If you ____ ____ breakfast, you ____ ____ hungry.

Conditional 1 (Unit 4)

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