都行!the特指,a泛指而已.这个貌似是错的，因为只能take the underground toyun！He go to work by bus; she take the bus to go to her office.他乘公共汽车上班,她乘公共汽车去办公室. I'd rather walk than take a bus.我愿意走路而不愿意坐公共汽车。Get off at the next stop and take a bus for the airport.在下一个车站下车并乘公共汽车去机场。 take the bus乘公共汽车.take the train乘火车. take a taxi乘坐出租车.······