电话营销人员向一个愉快的老客户销售，远比向一个新客户销售要简单得多。
参考答案：对
Bridge Street is a good place _______.
A. have fun B. to have fun C. having fun D to having fun
小李由于失血过多，急需输血。小李是O型血，他可以接受的血型为 [ ]
A．A型血
B．B型血
C．AB型血
D．O型血
