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 _____ _____.