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- 1. Multiple Choice
He .............. to change the light bulb. (It wasn't necessary.)
mustn't
didn't need
- 2. Multiple Choice
We .............. make fun of other people's appearance. (It's not a good thing to do.)
shouldn't
mustn't
don't have to
- 3. Multiple Choice
You ............ replace all your ordinary light bulbs with energy-efficient ones. (I advise you to.)
ought to
have to
needn't
- 4. Multiple Choice
Pedro ............... to do an assignment on the problem of deforestation in Spain. (It is necessary.)
had
have
has
- 5. Multiple Choice
You ................. buy products made from endangered species. (It is forbidden.)
shouldn't
mustn't
don't have to
- 6. Multiple Choice
You ..........recycle as much as possible. (It's a good idea.)
should
must
has to
- 7. Multiple Choice
Young people ................ respect the elderly. (It's their duty.)
needn't
ought to
must
- 8. Multiple Choice
People ................ hunt endangered species. (It's against the law.)
don't have to
mustn't
shouldn't
- 9. Multiple Choice
You ................. forget to wear sunscreen. (It's not a good idea.)
needn't
mustn't
shouldn't
- 10. Multiple Choice
Experts say that we all .......... try harder to protect the environment. (It is necessary.)
have to
has to
must
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