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That cat is stuck in a/an tree.
A. a
B. an

Random Topics:
Prepositions of Place & TimeGrammar (want to/ need to/ have to)Types of Simple SentencesFuture Tense - will and going toModal PossibilitiesGerund vs InfinitiveReported speech (statements)Simple Present Tense/be/Present ProgessiveAdjective, Adverb, and Noun FormsMain Idea and Sentence StructureOther quiz:
Grammar › ViewMost coffee shops are open _____ Sundays.
A. in
B. on
C. from
Vocabulary › View
Youngsters who use social network are in danger of _________ to inappropriate material.
A. exposed
B. expose
C. exposure