[ Grammar ]
Factories can always ________ masks if they need to.
A. mass production
B. mass producing
C. mass produced
D. mass produce
E. mass produces

Random Topics:
Verb 3 formsPrepositions and TensesWorld Literature VocabularyCorrelative ConjunctionGrammar of Conjunctions and PrepotitionsPast Perfect Simple & ContinuousIELTS VocabularyProgressive TenseTenses and FoodConditionalOther quiz:
Present Simple › ViewShe ____ to the movies on Fridays.
A. go
B. goes
Grammar › View
Boys, whose keys are these? Somebody must have left ____ keys here.
A. his
B. another
C. each other’s
D. every other’s
Past Tenses › ViewWhen we ___________ (arrive) at the party, everyone ___________ (sing).
A. arrived, was singing
B. arrived, sang
C. arrives, sings
D. arrive, was singing
Present Perfect Tense › View
They _______10 cars so far.
A. have have
B. have had
