{"answers": "D", "options": ["m : okay , so i 'll pay you 150 yuan after discount .", "m : okay , so i 'll pay you 120 yuan before discount .", "m : okay , so i 'll pay you 130 yuan before discount .", "m : okay , so i 'll pay you 120 yuan after discount ."], "article": "f : good morning . is there anything i can do for you ? m : good morning . i am looking for a pair of trousers for my son . could i see that pair hanging in the window ? f : sure sir . is this the pair you meant ? m : yes , that 's it . what are these trousers made of ? my son 's skin is quite sensitive , so i have to be careful about the material of the clothes he wears . f : these are made of cotton , sir . these are made by a famous children 's brand called wonder world . it 's a very popular brand because of the good quality material . m : oh , that 's good . what other colors do these trousers come in ? if you have blue , that would be great . blue is my son 's favorite color . i 'd rather not have black or gray . f : uh , these come in blue as well . here you are , a blue pair . m : thank you . and one last thing , how much do the trousers cost ? f : well , they were originally 150 yuan each , but they are now on sale 20 % off .", "id": "train_3136"}