[ Grammar ]
Factories can always ________ masks if they need to.
A. mass production
B. mass producing
C. mass produced
D. mass produce
E. mass produces
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A. argument
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The new shoes (fit/fits) perfectly.
A. fits
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C. fit
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A. arrived, was singing
B. arrived, sang
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Present Perfect Tense › View
They _______10 cars so far.
A. have have
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