15.听一篇短文,回答第16--20小题. 16.Many people like taking the略to school or to work in Nanjing. A.bus B.underground C.car 17.How much is the ticket of the bus? A.Only 1 yuan. B.More than 2 yuan. C.1 or 2 yuan. 18.What will a person do when he doesn't want to help the elderly on the bus? A.He will stand up and look out of the window. B.He will sit on the seat and look at the elderly. C.He will listen to music with eyes closed. 19.Why should we help each other? A.Because we know each other. B.Because we will need others'help one day. C.Because we are students. 20.How can we help a person in need when taking a bus? A.Buy the ticket for him. B.Let the elderly get on the bus first. C.Make the children give their seats to you.