[ Grammar ]
It was clear that a chemical factory had __________the pollution in the local rivers.
A. caused
B. had
C. made
Random Topics:
Adjective and AdverbModals AuxiliaryAdjective Clause and Adverb ClauseV-ing/to-VParts of Speech and Compound SentencesTenses and Time MarkersFirst ConditionalVerb, Object, PrepositionGrammar AssessmentComparatives, Superlatives & EquativesOther quiz:
Grammar › ViewI’m doing my project tonight, so I _____ go out with you.
A. can’t
B. am not
C. can not
D. don’t
Simple Past Tense › View
When the lights …… off, we …… our favorite series.
A. went …… were watching
B. were going …… were watching
C. went …… watched
D. were going …… watched
E. gone …… watched