[ Vocabulary ]
Greenpeace is an international group that protests against anything which is a ____ to the environment.
A. threat
B. threaten
C. threatening
D. threatener

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Grammar and ReadingDependent PrepositionsPhrases and ClausesVocabulary, Grammar, SpellingSimple Present and Simple PastFrequencyUse of Prepositions or ConjunctionsObject PronounsThe Future Simple TenseModals of ProbabilityOther quiz:
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A. over
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For vs Since › View
Cindy has driven her car _______ only five months.
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Grammar › ViewWe ____________ during recess.
A. chated
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The cats are the ______________ pets in Malaysia.
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