24/04/2024
24/04/2024
7. If you don't keep the water clean, the fish in this lake will die.
8. If you don't remember to turn off all the lights here, you will waste lots of electricity.
9. If you aren't patient, you won't pass the examination.
10. If we don't plant more trees, the air will be more polluted.
11. If you don't water these trees, they will die.
12. If we don't leave now, we will miss the plane.
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