[ Nouns & Pronouns ]
Improving working conditions can improve the ………of workers more than increasing their salary.
A. product
B. productive
C. produce
D. productivity
Select your answer:
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Grammar › ViewEverest _____half a century ago
A. Is first climbed
B. Was first climbed
C. Has been first climbed
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The pig _____________ around in the mud.
A. roll
B. rolls
C. rolling