[ Perfect Tenses of Verbs ]
By that time, the dance troupe had mastered the routine for their recital.
A. present perfect
B. past perfect
C. future perfect
Select your answer:

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Future Tenses › ViewWhich sentence is correct?
A. I will be waiting for you when you arrive.
B. I wait for you when you arrive.
C. I am waiting for you when you arrive.
D. I will wait for you when you arrive.
Science › View
Who is was the scientist that explained gravity and motion?
A. Isaac Newton
B. Albert Eienstien
C. Ben Franklin
