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36. The rapid development of shopping centers is mainly due to B. the increased use of the automobile. 37. A shopping center is a large group of stores facing a huge central mall which is D. shaded and comfortable. 38. American shopping centers are especially established in the suburbs because A. the customers want to avoid the heavy traffic in downtown areas. 39. Customers can't find the 'sense of closeness' in a modern shopping center because C. it is too modern and conventional. 40. In the shopping sections of many old cities in Europe, the stores are located along narrow twisting roads with many shops huddling together along sides.