Choose the word or phrase that best completes the sentence.

You're 18! You're_______to be able to look after yourself by now.

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have

ought

should

supposed

answer is D.

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Detailed Solution

Concept: 'Have', refers to an obligation or duty that's mandatory to an extent.
Therefore, option (1) is wrong.
‘Ought', refers to an auxiliary verb that indicates duty or obligation.
Therefore, option (2) is inaccurate.
‘Should', refers to being obliged to; have an obligation to; ought to; it indicates that the topic of the sentence has some obligation to execute the sentence predicate.
Therefore, option (3) is inaccurate as ‘should’ is additionally not followed by ‘to’ since it's a modal verb.
‘Supposed', refers to ‘required’; ‘a responsibility’.
Therefore, option (4) is correct because it correctly shows that the topic of the sentence encompasses a responsibility to appear after himself/herself, and not an order to try and do so.
Hence, option 4 is the correct answer.

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