[ Active and Passive Voice ]
Computers ________ since 1940s.
A. is in used
B. was used to
C. used
D. have been in use

Random Topics:
Grammar - Capitalization and Possessive NounsVerb to beConditionals and WishesAdverb Of PlaceVerb Forms and PrepositionsRelative Pronoun/AdverbsSynonymsSimple TenseArticles and DemonstrativesCoherent Sentence with Correct Grammar StructureOther quiz:
Modal Verbs › ViewYou ______ turn right when the light is red.
A. don’t have to
B. must
C. mustn’t
D. have to
Present Perfect Tense › View
How long _______ (you/know) ______ each other?
A. did … know
B. have … known
C. do … know
