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7. They closed the airport because it was so (FOG).
8. High winds can be very (DESTROY)
9. Lots of (NATURE) things are poisonous to humans.
10. Air (POLLUTE) isn't really a serious proDiem where we live.
11. Isn’t (GARDEN) a bit of a boring hobby?
12. The submarine went down to a (DEEP) of 200 metres.
13. The island isn't square - it's almost completely (CIRCLE).
14. Is it (DANGER) to swim in that lake?
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