Question

【题目】根据短文内容，用方框中所给词语的适当形式填空，使文章通顺、完整。

sleep, who, sit, similar, active, off, raise, how, little, kind

In today’s world, sleep experts often say that for a better night’s rest, Americans should turn 【1】 their smart phones or iPads before sleeping. Such electronic products make the brain more 【2】, and then influence their sleep. But according to a latest survey, more than 90% of Americans regularly use a computer or some other 【3】of electronic products in the hour before bed.

Researchers find that man-made light from some electronic products at night may reduce(减少) the brain chemicals that help 【4】. In the study, the researchers let volunteers read, play games and watch movies on a screen for different time while measuring【5】much light their eyes received. They found that two hours of 【6】before a bright screen at night reduced the sleep chemical levels by about 22%.

Then the researchers studied the college students 【7】 often used computers at night. They got the 【8】 results. And researchers say that may not only cause sleeplessness, but also 【9】 the risk of obesity(肥胖症), diabetes(糖尿病) and other diseases.

To be on the safe side, the researchers suggest that we should use computers 【10】 than before, or turn down our screens as much as possible before sleeping.

Answer 1

【答案】

【1】off

【2】active

【3】kinds

【4】(to) sleep

【5】how

【6】sitting

【7】who

【8】similar

【9】raise

【10】less

【解析】文章介绍了电子产品的光会影响睡眠。

【1】句意：美国人应该在睡觉前关掉他们的手机。根据Such electronic products make the brain more ______2______, and then influence their sleep.电子产品使他们的大脑更兴奋，影响他们的睡眠，turn off关掉和选词；故填off

【2】句意：电子产品使他们的大脑更兴奋，影响他们的睡眠。根据influence their sleep和选词；可知是活跃的；故填active

【3】句意：超过90%的美国人在睡觉前使用电脑或其他种类的电子产品。根据electronic products和选词；可知是种类，other+名词复数；故填kinds

【4】句意：调查发现从电子产品发出的光，能减少帮助睡眠的大脑的化学物质。根据上文电子产品影响睡眠，和选词，可知是睡眠，根据help (to) do sth帮助做某事；故填(to) sleep

【5】句意：测量他们的眼睛接受到多少光。根据how much多少，和选词；故填how

【6】句意：在晚上坐在亮屏幕前两个小时，减少睡眠化学物质大约22%。根据before a bright screen at night和选词，可知是坐，根据of可知用doing；故填sitting

【7】句意：在晚上经常使用电脑的大学生。这是定语从句的结构，先行词是college students和选词，可知引导词用who；故填who

【8】句意：他们得到相似的结果。根据And researchers say that may not only cause sleeplessness,和选词，可知是相似的结果，都影响睡眠；故填similar

【9】句意：而且也增加肥胖症，糖尿病和其他疾病的风险。根据And researchers say that may not only cause sleeplessness, but also和选词，可知也增加患病风险；故填raise

【10】句意：我们应该使用电脑比以前更少。根据or turn down our screens as much as possible before sleeping.和选词，可知是比以前少，less than少于；故填less