[ Modals of Probability ]
I’m tired. It ………………… be time for bed.
A. must
B. can’t

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Prepositions of Time and Place › ViewThe keys are __________ the table.
A. in
B. on
C. at
D. under
Adverb Clauses › View
He couldn’t go to the party __________ he was feeling sick.
A. until
B. if
C. as
D. before