词汇
his friends in his study. 他喜欢在书房里会见朋友。
16 thirsty adj. 渴望的 The youth are thirsty for knowledge. 年轻人渴望知识。
17 trouble n. 辛劳,辛苦 He took the trouble to gather the materials for us.
他不辞辛劳为我们搜集材料。
18. thirsty adj. 渴望的 The youth are thirsty for knowledge. 年轻人渴望知识。
19. born 天生的 He is a born artist. 他是一个天生的艺术家。
20.advantage=strength=plus优点，优势
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