[ Prepositions of Time ]
History is the study of events that occurred __ the past.
A. in
B. on
C. at
D. of
Select your answer:

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There is, There are, Some, Any › ViewWe use ________ in affirmative sentences.
A. some
B. any
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We didn’t watch television ________ we were working.
A. during
B. while
C. at
D. for
