[ Prepositions ]
Could you let me know ___________ Friday at the latest?
A. by
B. to
C. up to
D. until

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Tenses › ViewBefore I got to the end of his article, I felt I knew everything there ______ about the North America Free Trade Agreement.
A. had known
B. was to know
C. is known
D. is being known
Has and Have › View
Gregory ___ the flu in January.
A. have
B. has
C. had