[ Modals ]
Nobody answered the telephone at the dentist. I called several times.They ______ early.
A. cant have left
B. must have left
C. might have left
D. should have left

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Comparative Adjective › ViewMost people think cats are … … … fish.
A. more interesting
B. interesting than
C. interesting
D. more interesting than
Present Tenses › View
Joey ______________ (not study) for an exam this weekend.
A. studies
B. is studying
C. isn’t study
D. isn’t studying