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Difficulty: EasyModal Auxiliaries and Expressing Modality

Complete the sentence below by filling in the blank with the correct modal auxiliary verb that expresses strong obligation.

Answer:All candidates 【must】 present their original identification cards before entering the examination hall, as failure to do so will result in immediate disqualification.

Answer

must
The modal auxiliary verb 'must' is required because the sentence conveys a mandatory rule where compliance is compulsory.

Step-by-Step Solution

1
Analyze the context of the sentence to determine the intended modality.
The phrase 'failure to do so will result in immediate disqualification' indicates a strict requirement or compulsory duty.
Contextual clues in official rules dictate whether a modal verb should convey permission, obligation, possibility, or ability.
2
Select the modal auxiliary verb that denotes mandatory requirement.
The modal verb 'must' expresses strong, inescapable obligation mandated by an authority or rule.
'Must' is the correct modal verb used to express absolute necessity and requirement.

Key Concept

Modal auxiliaries expressing strong obligation and necessity
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Topics

Modal Auxiliaries and Expressing Modality

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