Topics: Modals of Obligation
You _______________ turn off your phone while you are at the bank.
A. shouldn’t
B. have to
C. don’t have to
D. should
Select your answer:

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Grammar › ViewA new flu vaccine _____ in the USA.
A. Has been found
B. Has been finding
C. Is found
D. Has found
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I have seen great _____ you made.
A. improve
B. improved
C. improvement
D. improving
