[ Perfect Modals ]
They ________ been in such a rush. They forgot all their belongings.
A. shouldn’t have
B. must have
C. might have
D. would have
Select your answer:

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Tenses › ViewTrue or False: The sentence ‘He is not home; he has been to the library’ is grammatically correct.
A. TRUE
B. FALSE
Present Perfect Continuous Tense › View
The Scientist mixes the formula
A. The Scientist has been mixing the formula
B. The Scientist has been mixxing the formula
