—I'd better ________ now.The water is boiling in the kitchen.
—Goodbye.
A．ring off B．ring up
C．hold on D．ring back
—I'd better ________ now.The water is boiling in the kitchen.
—Goodbye.
A．ring off B．ring up
C．hold on D．ring back
A 根据语境应是“挂断电话”，故答案为A。ring up意为“打电话”；hold on意为“不挂断”；ring back意为“回复电话”。