[ Perfect Modals ]
He ________ been at the party; I haven’t seen him there.
A. should have
B. must have
C. can’t have
D. could have

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Present Simple › ViewHe ____ our teeth before bed.
A. brushing
B. brushed
C. brushes
D. brush
Prepositional Phrases › View
This information helps businesses become more aware … their activities and impacts.
A. by
B. of
C. with
