Question

Difficulty: EasyModal Auxiliaries and Expressing Modality

Complete the sentence below with the correct modal expression:

'All guest lecturers _____ register at the main desk upon arrival, as it is a mandatory administrative requirement.'

Which of the following options correctly completes the sentence?

  1. mustAnswer
  2. B
    must to
  3. C
    might can
  4. D
    oughted to

Answer

The modal verb 'must' correctly expresses obligation and requirement without an added 'to' particle.
The verb 'must' accurately conveys compulsory obligation and correctly takes the bare infinitive verb form 'register'.

Step-by-Step Solution

1
Analyze the context of the sentence to identify the required modality.
The phrase 'mandatory administrative requirement' indicates official obligation.
Modal verbs express attitudes such as necessity, obligation, permission, or capability.
2
Select the appropriate modal auxiliary for obligation and verify its grammatical form.
'Must' is used for obligation and is followed by the bare infinitive 'register'.
Pure modal auxiliaries (can, could, may, might, must, shall, should, will, would) take a base verb without 'to'.

Key Concept

Modal Auxiliaries for Obligation and Complement Structure
Estimated Time:45s
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