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7. Do’s and Don’ts (Necessity, Obligation and Permission)

Choose the correct answer:

1. We use ____________ when something is compulsory, obligatory and important.

should
must
ought to

2. We use ____________ when something is the right thing to do.
should
must
ought to

3. We use ____________ when something is suggested or recommended.

ought to
should
must

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