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She lays a lot of emphasis on the usage of prepositions.她把重点放在介词的使用上.Prepositions and conjunctions are particles.介词和连词是小品词.The teacher asked us to fill in the blanks with prepositions.老师叫我们在空白处填入介词....
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prepositions的音标：prepositions的英式发音音标为：[prepə'zɪʃnz]prepositions的美式发音音标为：[prepə'zɪʃnz]...
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Complete the following sentences by filling the blanks with proper prepositions and adverbs.用适当的冠词和副词填空, 完成下列句子。Prepositions and conjunctions are particles.介词和连词是小品词.Many prepositions are used adverbially in English.在英语里...