chapter 9 (modal verbs)
Task 2:

1.We must not keep old tyres and empty cans in the garden.
2. The authorities must spray insecticide at waterlogged areas.
3. We must not leave disused containers all around.
4. The authorities must take action and punish offenders.
5. We must not keep fish ponds in tanks without fish.
6. The authorities must carry out fogging.
7. We must keep the surrounding clean.



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