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第4部分：阅读理解(第31～45题，每题3分，共45分) 下面有3篇短文后有5道题。请根据短文内容，为每题定1个最佳选项。 第一篇 The Clock That Wake You When You Are Ready Are you a real grump (脾气坏的人) in the mornings? Do you wake up every day feeling tired， angry and upset， and all too ready to flit the snooze (瞌睡) button? If so， then a new alarm clock could be just for you. The clock， called SleepSmart， measures your sleep cycle， and waits for you to be in your lightest phase of sleep before waking you up， Its makers say that should ensure you wake up feeling refreshed (恢复精力) every morning. As you sleep you pass through a sequence of sleep states - light sleep， deep sleep and REM sleep (快速眼动睡眼) - that repeats approximately every 90 minutes. The points in that cycle at which you wake can affect how you feel later， and may even have a greater impact than how long or little you have slept. Being wakened during a light phase means you are more likely to wake up cheerful and full of life and interest. SleepSmart records the distinct pattern of brain waves produced during each phase of sleep， via a headband equipped with electrodes (电极) and a microprocessor. This measures electric activity of the wearers brain， and communicates wirelessly with a clock unit near the bed. You program the clock with the latest time at which you want to be wakened， and it then at the proper time wakes you during the last light sleep phase before that. | 
