[ Grammar ]
Teachers _______ allow students to use their phones in class unless it’s an emergency.
A. must
B. should
C. ought not
D. ought to

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The Kiwi is one of ___ few birds in the world that cannot fly.
a. some
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As I cross the bridge over the Bosphorus, I can see the school _______ my friend studied.
A. where
B. that
C. which
D. who
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