1) environmental pollution is dangerous for the population because it causes various diseases.
2) Destruction of animal habitat is dangerous for all animal species.
1) How is he?
2) How is she?
3) How are they?
4) How is his son?
5) How are they?
An
much
a lot of
many
any
the
some
6. You might not go there yesterday. 7. You should go there: they are waiting for you. 8. You had to go there yesterday. 9. You didn't have to go there yesterday. 10. We may come to you tomorrow. 11. Where are they living now? They may be living abroad now, but I am not sure. 12. You should listen to him and try not to worry about it.
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