按要求改写句子。 1. That is an English bus. (改为复数句子) _____ _____ English _____. 2. They are English jeeps. (改为单数句子) _____ _____ English _____. 3. Those are maps. (改为一般疑问句, 并作否定回答) —_____ _____maps? —No, _____ _____. 4. David is in his room . (对划线部分提问) _____ _____ David? 5. That's OK. (变为同义句) That's _____ _____.