题目

句型转换。1. We write Christmas cards to Wang Ling.(对画线部分提问)_________________________________________2. Danny bought a star yesterday.(对画线部分提问)___________________________________3. This is a Christmas card.(变为复数句) __________________________4. Are you going to send a card? (作肯定回答) _________________________5. I can write my card.(改为一般疑同句) ________________________________双曲线的虚轴长等于(    )  A．B．C．D．4