[ Noun Clause ]
The visitors want to know _________ they can take photos or not.
A. when
B. how
C. who
D. if
Select your answer:

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Grammar › ViewHow many hours a day do you sleep?
A. I slept 7 hours.
B. I sleep 7 hours.
C. I’m sleeping 7 hours.
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Mexico is north __________ Guatemala.
A. on
B. to
C. of
