[ Grammar ]
Complete the sentences with the correct form of the modals and verbs in parentheses:
We ___________ (must / maintain) excellence in our customer service or people will complain.
___
A. mustn’t maintain
B. must maintain
C. must maintains

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PrepotitionsRelative Pronoun/AdverbsGerunds and InfinitivesQuestion WordsVerbs of movementCardiology ServicesMay, MightPronouns, Sentence Structure, and ApostrophesDemonstrative PronounVocab CheckingOther quiz:
Grammar › ViewDue to coronavirus, they _____ out since last Wednesday.
A. didn’t go
B. haven’t went
C. hasn’t gone
D. haven’t gone
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The police are still _______ the thief.
A. looking into
B. looking for
C. looking through
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a. judge
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Jake is a good footballer. Do you know since when _____ football?
A. he has been playing
B. he plays
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