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1. 1) recycling 2) 3) volunteers 4) nesting 5) acid rain 2. 1) has been playing 2) Has she been writing 3) haven't been sleeping 4) Have you been working 5) I have been painting 3. 1) ,is he? 2) ,doesn't she? 3) ,won't you? 4) ,has she? 5) ,did he?