The kitchen looks clean. Someone ___ have cleaned it recently. ...

[ Modal Verbs ]

The kitchen looks clean. Someone ___ have cleaned it recently.

A. could

B. must

C. must not

Select your answer:
A B C D E

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Verbs and Adverbs Active Voice-Present tense Infinitives Phrase or Clause Present Tenses Simple Present - WH Questions Grammar Suffixes Academic Vocabulary In/On/At + Time Verbs: Action, Linking, and Helping

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