The movie theater _______________ full because there were still tickets ...

[ Past Modals ]

The movie theater _______________ full because there were still tickets for sale.

A. could have been

B. must not have been

Select your answer:

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Grammar › View

Mai is___________. She learns things quickly and easily.

A. careful

B. active

C. creative

D. clever

Modals with Perfect Infinitive › View

—Wow, Sally has never missed a day of work before.—Well, she was coughing yesterday, and she didn’t look good. She ___ gotten sick.

A. should have

B. might

C. must have

D. can’t have