单项选择题A.To sell and to inform.B.To increase prices and competition.C.To change the means of selling and buying.D.To take away chances of choosing from customers.
单项选择题A.Mother and son.B.Father and daughter.C.Teacher and student.D.Husband and wife.
单项选择题What made an impression on the narrator
单项选择题Why did the narrator mention his niece
单项选择题When did the story take place