【正确答案】 C

【答案解析】[听力原文] 12-14
In most parts of the United States, Friday night is the big supermarket night, probably because Friday is payday in many factories and businesses. Most housewives also do their weekend shopping on either Friday or Saturday, although supermarkets in many places are now open on Sunday as well.
In almost all supermarkets there are shopping carts with a special space to set the baby. In the early days, before there were carts, it was noticed that as soon as a woman shopper had her arms full of goods, she stopped buying. Thus carts were introduced. Later a space for the baby was provided in the cart. With the baby sitting comfortably in the cart, the mother felt less need to hurry through the store and she would probably buy more. It is said that the average American housewife goes to the supermarket twice a week. On average she will spend from one hour to two hours there each week.
细节题。独白第一句即指出周五晚上是美国大多数地区超市最忙的，且说明了原因：Friday night is the big supermarket might, probably because... 选[C]。注意，该句中的big在此指“重要的”。

【正确答案】 A

【答案解析】[解析] 本题属于推断题。独自第二段前半部分说明了超市为顾客提供购物车的原因。其中有一句指出了提供购物车后的结果，这也是超市这样做的原因和目的：...and she would probably buy more(她就很可能多买东西)。故本题答案是[A]。

【正确答案】 B

【答案解析】[解析] 细节题。独自第二段倒数第二句明确指出：...the average American housewife goes to the supermarket twice a week(一般的美国家庭主妇每周去两次超市)。