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Ⅰ.动词(Verbs) 1
Ⅱ.名词(Nouns) 23
Ⅲ.形容词(Adjectives) 41
Ⅳ.副词(Adverbs) 61
Ⅴ.连接词(Conjunctions) 75
练习答案(Key to Exercises) 81