您要查找的是不是：
- Is it necessary to change trains? 需要换火车吗？
- Is it necessary to book the tickets in advance? 有必要提前订票吗?
- Is it necessary to follow a special diet? 需要遵照特定的饮食吗?
- Is it necessary to take time from the lunch hour? 有必要占用午餐时间吗?
- Is it necessary to learn English well? 学好英语有必要吗？
- Is it necessary to reenact these additional rules ? 有必要再制定这些补充规则吧?
- Is it necessary to write post code? 必须写上邮递区号吗？
- Be it necessary to change train? 必须换车吗?
- Why is it necessary to have top class coaches? 为什么需要有最高水平教练人员?
- Q: Why is it necessary to erase past karma? 问:请问为什么需要消除过去的业障?
- Is it necessary to give you a ring immediately? 有必要立即给你回电话吗?
- Is it necessary to keep the brushes in water? 这些刷子需要泡在水里吗?
- Is it necessary to change? 要转车吗?
- Is it necessary to remind him about the party? 有必要提醒他不要忘记赴宴吗?
- Is it necessary to remove weeds now and then? 经常除掉杂草有必要吗?
- Is it necessary to wake you up tomorrow morning? 明天早晨要叫醒你吗?
- Steven Is it necessary to reserve a ticket? 世博园门票是否需要预定。
- Is it necessary to set down these additional rules? 有必要制定这些补充规定吗?
- Is it necessary to have an offshore substation ? 有一个海上分电站是必要的吗?
- Is it necessary to have top class coaches? 有必要拥有最高水平的教练员吗?
