[ Grammar ]
The passengers _________wear their seat belts at all times.
A. could
B. must
C. can
D. may

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Grammar › ViewSir Arthur Conan Doyle, who passed away many years ago, _________ Sherlock Holmes.
A. was creating
B. used to create
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The girl … lives next door is my friend.
A. who’s
B. who
C. whose