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Form Modals Unit Complete Sentences Correct Verb Choose

Id 0691
Category Modals
Unit Unit 28: Must and can't
Rubric Complete the sentences with the correct form of the verb. If more than one form is correct, choose both.
Question Don had a lot of tests at the hospital this morning. It can't have been / couldn't have been pleasant for him.
Choices can't have been;must have been;couldn't have been

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