[ Modal Verb ]
Peter has been working for 10 hours. He _______ be very tired now.
A. must have
B. must
C. mustn’t
D. needn’t
Select your answer:

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Perfect Modals › ViewI’m not sure. He ______ had an argument with his wife.
A. must have
B. may have
C. mightn’t have
D. should have
To Infinitive or Gerund › View
Why did Kate refuse ___ (help) you?
A. to help
B. helping
