题目

A traveler comes out of the airport(机场). There are many ____ parked on the street. He looks around ______ and asks every driver’s name. After that he ____ one of these taxis. It costs(花费) five dollars to go from the_______to the hotel. Then the traveler asks the driver to show him around the city ______ a whole day. For the service( 服务), the driver wants 100 dollars. It is very expensive, ______ the traveler says nothing and agrees(同意). The driver takes the man ______ happily. In the evening they goes ______ to the hotel. The traveler gives 100 dollars to the driver and asks 有一瓶14%的氢氧化钾溶液，加热蒸发掉100g水后，得到28%的氢氧化钾溶液80mL，所得溶液的浓度为A．5mol/L         B．6mol/L         C．6.25mol/L                 D．6.5mol/L