Grammar Quiz

[ Grammar ]

Once ____ for viruses, the software can be installed in the school computer system for use.

A. has tested

B. tested

C. testing

D. is tested

Select your answer:
         


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Comperative and SuperlativeSentence CompletionComparative and Superlative AdjectivesGrammar ModalsPassive Voice in Past Simple TensePhrases and ClausesPronouns, Sentence Structure, and ApostrophesModals of ProhibitionSubject Verb Agreement Irregular Verb

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