阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

    Are you sometimes a little tired and sleepy in the early afternoon? Many people feel this way after lunch. They may think that eating lunch is the cause of the sleepiness. Or, in summer, they may think it is the heat. However, the real reason lies inside their bodies. At that time—about eight hours after you wake up—your body temperature goes down. This is what makes you slow down and feel sleepy. Scientists have tested sleep habits in experiments where there was no night or day. The people in these experiments almost always followed a similar sleeping pattern. They slept for one long period and then for one short period about eight hours later.

    In many parts of the world, people take naps (小睡) in the middle of the day. This is especially true in warmer climates, where the heat makes work difficult in the early afternoon. Researchers are now saying that naps are good for everyone in any climate. A daily nap gives one a more rested body and mind and therefore is good for health in general. In countries where naps are traditional, people often suffer less from problems such as heart disease. Many working people, unfortunately, have no time to take naps. Though doctors may advise taking naps, employers do not allow it! If you do have the chance, however, here are a few tips about making the most of your nap. Remember that the best time to take a nap is about eight hours after you get up. A short sleep too late in the day may only make you feel more tired and sleepy afterward. This can also happen if you sleep for too long. If you do not have enough time, try a short nap—even ten minutes of sleep can be helpful.

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

    How do you usually buy what you need, shopping on line or going out to shop in person? With the help of the Internet, shopping is {#blank#}1{#/blank#}(easy) than before. We can just click our mouse to choose the things we like, pay for them online, and the shopping {#blank#}2{#/blank#}(finish). It is easy and quick. It helps save money, too. We can save thousands a year if we compare the prices of similar items (商品) before deciding which{#blank#}3{#/blank#}(buy).

    However, there are always{#blank#}4{#/blank#}(trap) in shopping online. If we are {#blank#}5{#/blank#}(care), we may get into trouble. For example, we may find the color of the item different {#blank#}6{#/blank#}that in the picture online. Sometimes, the size of the item we receive can be too big{#blank#}7{#/blank#}too small. To avoid such troubles, we should compare similar items on different online stores and pay more attention to what other customers say. From their opinions, we can know {#blank#}8{#/blank#}(well) about an item's color, size as well as {#blank#}9{#/blank#}(it) shortcomings. In this way we increase our chance of buying{#blank#}10{#/blank#}more satisfactory item.