[解析]
BAText 6
W:I just saw Jack at the bus station.Why is he waiting for a bus?
M:He has to go to a lecture at 10:00 this morning.
W:I know that.But why did he have to wait for a bus?You always go to school by bicycle together,don't you?
M:That's night.But his bike broke down,and he had it repaired this morning.