Topics: Modal Verbs & Time Prepositions
Which time preposition is correct in this sentence: The flight departs ___ 6 AM?
A. by
B. at
C. in
D. on
Select your answer:

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Grammar › ViewWhich of the following is a common noun?
A. Walmart
B. Burger King
C. restaurant
D. Plaza del Caribe
Grammar › View
The robot manufacturer had his customers ___ their outdated robots.
A. exchange
B. exchanged
C. to exchange
D. exchanging
