[ Present Perfect Continuous Tense ]
He … since 7 o’clock.
A. Has been studying
B. Is been studying
C. Studying
Select your answer:

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Vocabulary › ViewWhich word means economic model that allows citizens to determine what goods and services are produced
A. Traditional Economy
B. Mixed Economy
C. Market Economy
D. Command Economy
Grammar › View
What is the meaning of the word “stands”?
A. a way of doing something
B. to make a point or points in a game
C. seats at a stadium or ballpark
D. hit with sudden force
