【正确答案】 D

【答案解析】[听力原文] I'd like to look at a vital aspect of e-commerce, and that is the nature of the product or service. There are certain products and services that are very suitable for selling online, and others that simply don't work. Suitable products generally have a high value-to-weight ratio. Items such as CDs and DVDs are obvious examples. Books, although heavier and so more expensive to post, still have a high enough value-to-weight ratio, as the success of Amazon, which started off selling only books, shows. Laptop computers are another good product for selling online. Digital products, such as software, films and music, can be sold in a purely virtual environment. The goods are paid for by online transactions, and then downloaded onto the buyer's computer. There are no postage or delivery costs, so prices can be kept low. Many successful virtual companies provide digital services, such as financial transactions, in the case of Paypal, or means of communication, as Skype does. The key to success here is providing an easy-to-use, reliable service. Do this and you can easily become the market leader, as Skype has proved. Products which are potentially embarrassing to buy also do well in the virtual environment. Some of the most profitable e-commerce companies are those selling sex-related products or services. For a similar reason, online gambling is highly popular. Products which are usually considered unsuitable for selling online include those that have a taste or smell component. Food, especially fresh food, falls into this category, along with perfume. Clothes and other items that need to be tried on such as diamond rings and gold necklaces are generally not suited to virtual retailing, and, of course, items with a low value-to-weight ratio. There are exceptions, though. Online grocery shopping has really taken off, with most major supermarkets offering the service. The inconvenience of not being able to see the food you are buying is outweighed by the time saved and convenience of having the goods delivered. Typical users of online supermarkets include the elderly, people who work long hours and those without their own transport. What is important to the success of an online store?

【正确答案】 A

【答案解析】[听力原文] What products are unsuitable for selling online? 四项均是对某种特定商品或服务的属性或特征的描述。本题考查的内容应该与某种特定的产品或服务的特点有关，听录音时应将重点放在四项的关键信息上(taste or smell component embarrassing to buy，careful handling，personal element)。 讲话的中间部分提到，通常来说，不适合在网上销售的产品包括那些需要人们品尝或者闻味道的产品，后面列举了新鲜食品和香水的例子，因此可以得出A项为正确答案。B项是讲话中提到的特别适合在网上销售的产品，另外两项讲话中没有提及，故排除。

【正确答案】 B

【答案解析】[听力原文] Who are more likely to buy groceries online? 四项均以those who开头，都是描述了某一类人群。本题考查的内容应该是哪类人会做某事，根据前两道题可以判断，是问哪类人喜欢或不喜欢在网上买东西。听音时应将重点放在四项的关键信息上(live in the virtual world，work long hours，used to online transactions，paying a little more)。 讲话的最后部分提到，在网上超市购物的典型人群包括老年人、工作时间长的人以及自己没有交通工具的人。由此可知B项为正确答案。A项中的virtual world和C项中的online transactions都是原文提到的表达，但这两类人并不是讲话中提到的更可能在网上购买食品杂货的人，所以可以排除。D项讲话中没有提及，故排除。