[ Grammar ]
He ________ swim when he was four.
A. may not
B. musn´t
C. couldn´t
D. can´t
Select your answer:
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Grammar › Viewa root that means “to write”
A. sub
B. pre
C. scrib
Modal Verbs › View
The police interrogated the suspect for more than four hours, but she ………. the names of her co-conspirators.
A. -would not reveal
B. -mustn’t have revealed