1. Is this a box? (改为复数句子) ___________________________________? 2. What"s that? (用egg回答) ___________________________________. 3. Steve is eleven. (对画线部分提问) ___________________________________? 4. Amy is in Class Two. (对画线部分提问) ___________________________________? 5. Those are erasers. (改为一般疑问句,并作否定回答) ___________________________________? ___________________________________.