There was a knock at the door. It was the fourth time someone ______ (interrupt) me that evening.

A．I often write to you.
B．I write some letters.
C．Once a month.
D．I often go to see my parents.

A．这辆公共汽车的驾驶员与这些乘客的安全有关。
B．每辆公共汽车的驾驶员要保证乘客按时到达目的地。
C．公共汽车的司机对乘客的安全负有责任。
D．乘客的安全得由这个公共汽车的司机负责。