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Carol is very ill. She _____________ take medicines every day.
can
may
must
might
Correct Answer: Must
Explanation:
We use the modal verb 'must' when we talk about duties or when it is necessary to do something.
Pupils __________ wear a school uniform in some countries.
can
may
have to
might
Correct Answer: have to
Explanation:
We use the modal verb 'have to' when it is not our idea to do something, when we are forced to do something by somebody or by circumstances.
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