如图所示，一带电为-q的小球，质量为m，以初速度v₀竖直向上射入水平方向的匀强磁场中，磁感应强度为B。当小球在竖直方向运动h高度时，球在b点上所受的磁场力多大？

Susan Jones was at the bus stop well on time to take the 7:01 bus, but she had to miss her breakfast to do it.

A．catch up with

B．catch

C．run up to

D．be catching