题目内容
18．We are volunteers that do，and will always，meet our______ to the world and particularly to those who so desperately need our support．（ ）| A． | requirements | B． | objections | C． | commitments | D． | threats |
分析 我们做出承诺并且总是会履行我们对世界的承诺的志愿者，特别是对那些迫切需要我们支持的人们的承诺．
解答 答案是C．
本题考查名词词义辨析．A项表示"要求，需要"；B项表示"反对"；C项表示"承诺，致力，奉献"；D项表示"威胁"；meet our commitment to the world"履行我们对世界的承诺"，所以答案选择C项，其它选项不符合逻辑．
点评 本题考查名词词义辨析，考生在平时的学习中应注意积累相应的词汇和搭配，并牢记其意思．在做题时，将词义和题干相结合，从语法、句子结构尤其是句意上去判断，句意通顺，符合逻辑，即正确答案．
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6．Do you always experience tired eyes at an even more frequent rate？What if your eyes are in such a kind of condition？There is no need to worry about it because it is so common nowadays．On the contrary，you should find the factors and then seek some appropriate treatments for them．
Some folks don't wish to waste even a second at work，even to blink （眨眼）for a fraction of a second．Staring constantly at the screen can cause stress to one's eyes．Sitting and staring at the television screen for hours can also make the eyes tired．
Bookworms love reading and they will make sure they read much more than their bodies can deal with．The desire to finish a book may result in fast reading，without taking breaks，which can lead to tired eyes．Continuous reading in dim light can also cause pressure to the eyes．
Decreased water intake and overindulgence （过度放纵）in salt-based junk food items like burgers，pizzas，etc．also play a role in causing tired eyes．These junk food items do not furnish the body with the required essential nutrients，thus causing a lack of vitamins，which also has an effect on tired eyes．
Stress at the workplace or at home and a noisy sleeping environment cannot bring enough sleep at night．Lack of sleep causes the eyes to become heavy．Dark circles are also seen to develop if one doesn't get sufficient sleep over a period of time．
Even though this condition is not fatal，it is stressful for the health of the body，and must be treated．If not treated on time，the condition can become worse and result in double or blurred vision．Here are some ways to treat the tired eye condition．
Every hour during your day at work，spend a minute relaxing your eyes．Look away from your computer screen and roll your eyes in both directions．Try and blink more often．Look around the room or close your eyes for a minute if you want and then work again．Following this every hour will help reduce overall stress on your eyes，and you won't feel so tired after work．
Caffeine present in the tea helps relieve tired eyes．Make a cup of hot black tea and pour it into a glass．Hold the glass close to your eyes，so that the vapors from the tea reach your eyes．This may be troublesome，so instead you can also use tea bags to relieve your eyes．Dip two black tea bags in a cup of hot water and once the warmth is bearable place the warm tea bags onto your eyes．This will also make you feel fresh．
If your eyes feel extremely tired at work，go to the washroom and wash your face with cool tap water．The cold water will help relieve the tired feeling．Do this every hour during work and you will find relief．
Some folks don't wish to waste even a second at work，even to blink （眨眼）for a fraction of a second．Staring constantly at the screen can cause stress to one's eyes．Sitting and staring at the television screen for hours can also make the eyes tired．
Bookworms love reading and they will make sure they read much more than their bodies can deal with．The desire to finish a book may result in fast reading，without taking breaks，which can lead to tired eyes．Continuous reading in dim light can also cause pressure to the eyes．
Decreased water intake and overindulgence （过度放纵）in salt-based junk food items like burgers，pizzas，etc．also play a role in causing tired eyes．These junk food items do not furnish the body with the required essential nutrients，thus causing a lack of vitamins，which also has an effect on tired eyes．
Stress at the workplace or at home and a noisy sleeping environment cannot bring enough sleep at night．Lack of sleep causes the eyes to become heavy．Dark circles are also seen to develop if one doesn't get sufficient sleep over a period of time．
Even though this condition is not fatal，it is stressful for the health of the body，and must be treated．If not treated on time，the condition can become worse and result in double or blurred vision．Here are some ways to treat the tired eye condition．
Every hour during your day at work，spend a minute relaxing your eyes．Look away from your computer screen and roll your eyes in both directions．Try and blink more often．Look around the room or close your eyes for a minute if you want and then work again．Following this every hour will help reduce overall stress on your eyes，and you won't feel so tired after work．
Caffeine present in the tea helps relieve tired eyes．Make a cup of hot black tea and pour it into a glass．Hold the glass close to your eyes，so that the vapors from the tea reach your eyes．This may be troublesome，so instead you can also use tea bags to relieve your eyes．Dip two black tea bags in a cup of hot water and once the warmth is bearable place the warm tea bags onto your eyes．This will also make you feel fresh．
If your eyes feel extremely tired at work，go to the washroom and wash your face with cool tap water．The cold water will help relieve the tired feeling．Do this every hour during work and you will find relief．
| Tired Eyes：Why and How？ | |
| Passage outline | Supporting details |
| （41）Factors leading to tired eyes | ●Staring constantly at the computer screen Your eyes will become （42）stressfulor tired after staring at the screen for hours． ●Reading for long hours Finishing a book without taking breaks or reading in dim light does （43）harmto the eyes． ●Diet Various salt-based junk food without required essential nutrients will （44）causea damage to the eyes． ●（45）Lackof sleep Your eyes become heavy without enough sleep，and thus dark circles are often seen． |
| （46）Treatmentsfor tired eyes | Though having tired eyes doesn't pose a （47）threatto the health of people's body，it's important to treat them immediately． ●Eyes exercise Take a minute to （48）relaxyour eyes every hour at work，like blinking more often，（49）rollingyoureyes in both directions and looking around the room． ●Tea Use vapor from black tea because it （50）containscaffeine or put warm tea bags onto your eyes． ●Wash your face Go to the washroom and wash your face with cool tap water．The cold water will help relieve the tired feeling． |
A smiling face with tears，or"Tears of joy"，was chosen as the most popular emoji globally in 2016，according to a report（61）published（publish）by Chinese tech startup Kika．