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Verbs + prepositions 動(dòng)詞＋介詞 Verbs + prepositions 動(dòng)詞＋介詞 Verbs + prepositions 動(dòng)詞＋介詞
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1 In Mr Smith's class we often discuss _________ really interesting topics, you know - politics, religion, the environment!
 
about
of
to
--- (no preposition)

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