D．Because red gets their message across easily.

　　解析：选C　细节理解题。由第二段中的“Red is the powerful color”和“There's something about red that always comes back to strength and passion.”可知选C。

　　2．Who will probably choose the purple ties?

　　A．Politicians. B．Businessmen.

　　C．Artists.

　　D．Head teachers.

　　解析：选B　细节理解题。由第三段中的“business meetings because the color ... more acceptable in the workplace.”可知，紫色会让职场人士显得自信，从而获得良好的第一印象，象征尊贵。

　　3．What color tie will you consider if you are a green­hand at work?

　　A．Red.

　　B．Purple.

　　C．Black.

　　D．Blue.

　　解析：选D　推理判断题。综合全篇可以看出红色领带适合政治家；紫色领带适合商业人士；而新人应避免戴黑色领带，由最后一段中的“Consider blue as the all­purpose tie.”和“Blue is the safest color to wear”可知对于新手来说，戴蓝色领带最为保险。

　　B

　　(2016·潍坊市第一中学高三上学期月考)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.

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