[ Grammar ]
______ make noise when you are in the library because everyone is studying.
A. Don’t have to
B. Must
C. Don’t
D. Can
Select your answer:

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Grammar › ViewMum ________ to Spain before.
A. has never been
B. have never was
C. have never been
D. has never were
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If I ______ about your problem, I would have tried to help you.
A. had known
B. knew
C. would know
D. would have known
