按要求改写句子。 1. Is this your house? (做否定回答) ________________________________ 2. These are dishes. (改为单数句子) _________________________________ 3. Mum is cooking eggs. (对画线部分提问) _________________________________ 4. Li Ming is in the corner. (对画线部分提问) __________________________________ 5. What time is it? (用现在是“七点钟”回答) ___________________________________