问题
句型转换
按要求完成句子。
1. They are collecting leaves.（改为一般疑问句，并作肯定回答）
2. He is catching butterflies.（改为一般疑问句，并作否定回答）
答案
1. Are they collecting leaves? Yes, they are.
2. Is he catching butterflies? No, he isn't.
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