[ Grammar ]
Several missing files, which _____ yesterday, contained sensitive information about security protocols for company databases.
(A) found
(B) had found
(C) has been finding
(D) were found

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Tenses and Verb FormsNoun, Pronoun, Adjective, VerbGrammar of Conjunctions and PrepotitionsRegular Plural NounsOrder of AdjectivesPast Tense and Perfect TenseUse of Prepositions or ConjunctionsComparatives or SuperlativesSentences vs Run-OnsPresent Perfect ContinuousOther quiz:
Grammar › ViewI am sure David ________________ taken you books by mistake.
A. shouldn’t have
B. must have
C. couldn’t have
D. might have
Reported Speech › View
” We are going to a concert tonight.”
A. She told me they are going to a concert that night.
B. She told me they were going to a concert that night.
C. She told me we would go to a concert that night.
D. She said they had going to a concert that night.