[ Grammar ]
What are you doing? Don’t you know that you _______ write on the desks?
A. don’t have to
B. mustn’t
C. needn’t
Select your answer:
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Grammar (was, were, could, could not) › ViewMary’s grandfather________play chess and he was the best!
A. could
B. couldn’t
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If you want to learn to speak English fluently, you ______ to work hard.
A. could
B. need
C. needn’t
D. mustn’t