Do you wake up every day feeling too tired, or even upset? If so, then a new alarm clock could be just for you. The clock, called SleepSmart, measures your sleep cycle, and waits【C1】______you to be in your lightest phase of sleep【C2】______ rousing you. Its makers say that should 【C3】______you wake up feeling refreshed every morning. As you sleep you pass【C4】______ a sequence of sleep states—light sleep, deep sleep and REM (rapid eye movement) sleep—that 【C5】______ approximately every 90 minutes. The point in that cycle at which you wake can【C6】______how you feel later, and may【C7】______ have a greater impact than how much or little you have slept. Being roused during a light phase 【C8】______you are more likely to wake up energetic. SleepSmart 【C9】______ the distinct pattern of brain waves 【C10】______during each phase of sleep, via a headband equipped 【C11】______ electrodes and a microprocessor. This measures the electrical activity of the wearer" s brain, in much the【C12】______way as some machines used for medical and research【C13】______ , and communicates wirelessly with a clock unit near the bed. You【C14】______the clock with the latest time at 【C15】______you want to be wakened, and it 【C16】______duly wakes you during the last light sleep phase before that. The 【C17】______was invented by a group of students at Brown University in Rhode Island 【C18】______ a friend complained of waking up tired and performing poorly on a test."【C19】______sleep-deprived people ourselves, we started thinking of【C20】______to do about it," says Eric Shashoua, a recent college graduate and now chief executive officer of Axon Sleep Research Laboratories, a company created by the students to develop their idea.
单选题
【C1】
【正确答案】
C
【答案解析】解析：考查固定搭配。wait为不及物动词，wait for为固定搭配，意为“等待”，wait for sb．to do sth．意为“等待某人做某事”。故C．for为正确答案。
【答案解析】解析：考查上下文语义与动词辨析。本题的解答有赖于对前一句话的理解，前一句中的“a sequence of sleep states”指一个睡眠状态的顺序，而且后面一句中的“in that cycle”也暗示前面提及的现象是一个循环过程。再结合本句的every 90 minutes，可以确定应该选择含有重复意思的repeat，即这个睡眠状态的顺序每90分钟重复一次。故D．repeats为正确答案。reveal意为“揭示，显示”；reverse意为“反转，颠倒”；resume意为“(中断后)重新开始，恢复”，均不符合题意。
单选题
【C6】
【正确答案】
B
【答案解析】解析：考查动词辨析。本句中，______how you feel later和have a greater impact是并列的谓语成分，因此所选的动词应该和impact具有相近的意思，B．affect意为“影响”，符合语境，为正确答案。effect作动词时，意为“实现，使生效”；reflect意为“反映，反射”；perfect作动词时意为“使完美”，均不符合题意。
单选题
【C7】
【正确答案】
D
【答案解析】解析：考查逻辑关系。对“The point in that cycle at which you wake can ______how you feel later，and may ______have a greater impact than how much or little you have slept．”进行综合分析．尤其是通过“a greater impact than”可知，后者程度递增，D．even“甚至”表示递进，符合语境，为正确答案。
【答案解析】解析：考查动词辨析。______during each phase of sleep作后置定语修饰brain waves，brain waves作空格所填词的逻辑宾语。故首先可以排除不及物动词proceed“继续进行”和progress“进步，前进”。pronounce“发音，宣布”虽然可作及物动词，但是不能用brain waves作宾语。B．produced意为“生产，产生”，符合语境，为正确答案。