[ Passive Voice ]
Since the 1970s, computers ________ at a low enough cost to allow individuals to own a personal computer.
A. will be produced
B. have been produced
C. are produced
D. were produced

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Grammar: is/are/was/wereUsed to & would & Past SimpleHas and HaveSimiles, Metaphors, Personification and HyperbolePronouns and Subject Verb AgreementFirst Conditional & Future TensesInfinitives and ING FormsPassive Voice, Modals of Deduction and First Conditionaltake, make, doHow often - long - much - manyOther quiz:
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A. by far twice the largest
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A. The
B. A
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What does “reluctant” mean?
A. Unwilling or hesitant to do something
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