A training session was held on Tuesday for tour guides who should encourage visitors to participate in garbage sorting and
recycling
recycling
（回收利用） during their tours.

【答案】recycling

【解答】

【点评】

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发布：2024/5/23 20:38:36组卷：0引用：1难度：0.8

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A training session was held on Tuesday for tour guides who should encourage visitors to participate in garbage sorting and recyclingrecycling（回收利用） during their tours.