单项选择题
A. a cleaner B. a head of department C. a student D. a lecturer E. a receptionist F. the proprietor G. an agent H. the technician
A. including building materials, office products, and, of course, groceries B. attracting more customers with their low prices C. primarily in either of two ways D. to compete with grocery chains E. a type of retailing institution F. by size and assortment G. than a conventional supermarket does