[ Grammar ]
Supply and demand have a direct ____ on the prices of commodities.
A. effect
B. affect

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Simple Present vs Present Continuous › View_____you______computer games right now?
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I ______ submit the report by the end of the day.
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Grammar › View
Which sentence uses present continuous?.
A. Solving the puzzle took about an hour.
B. We solved the puzzle for an hour.
C. We were trying to solve the puzzle for an hour.
D. The puzzle solved for an hour.
