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_____ lakes are usually cleaner than rivers.
A. the
B. a
C. an
D. none

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was werePre-intermediatePassive to ActiveConditional ClauseRelative & ModalsPerfect and Past TenseDependent ClausesMesopotamia VocabularyClauses and ConjunctionAll, Both, Neither, None, EitherOther quiz:
Vocabulary and Grammar › View. They say that the _____ was started by some hunters cooking food.
A. earthquake
B. volcanic eruption
C. tornado
D. wildfire
Grammar › View
Will all of the ______ please assemble in the auditorium?
A. alumnus
B. alumni
C. alumna
Present Perfect › ViewHave you ______ played golf ?
A. never
B. always
C. seen
D. ever
Vocabulary › View
Choose the word that completes: “The _ rain caught everyone by surprise.”
A. sudden
B. unexpected
C. intense
D. heavy
