★ Modal and Modal Perfect
Patty ____________ at the mall last night. She was out of town visiting her mother.
A. couldn’t have been
B. must have been
C. mustn’t have been
D. could have being
Preview next quiz:
Emma did very well on her English test. She _______ studied hard.
A. might have
B. should have
C. must have
D. shouldn’t have
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