You left without me．Can you tell me the reason that?( )A．telling.ofB．tell.ofC．telling.forD．to tell.for 题目和参考答案——青夏教育精英家教网—

题目内容

17．You left without ____ me．Can you tell me the reason ____ that？（　　）

A．

telling，of

B．

tell，of

C．

telling，for

D．

to tell，for

分析你都没有告诉我就走了，你能告诉我你那样做的原因吗？

解答答案：C
解析：without"没有"是介词，其后应该接动词的-ing形式；故B、D选项直接排除．The reason for"…的理由/原因"为固定短语，故A选项排除．综上，本题答案为C选项．

点评本题考查介词的辨析，做此类题题目时一定要清楚各个选项的含义及用法，再结合句意及其它要求选出最终答案．

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7．A new study has found that social media could be affecting the sleep of young adults．The study is a project of researchers at the University of Pittsburgh's School of Medicine．They found that young people who often use social media are more likely to suffer from sleep disorders than those who use social media less．
The researchers say doctors should ask young adults about their use of social media when treating sleep issues．"This is one of the first pieces of evidence that social media use really can affect your sleep，"said Jessica C．Levenson．She is a postdoctoral researcher in the university's Department of Psychiatry．She was the lead author of a report on the study．The researchers set out to examine the connection between social media use and sleep among young adults．
The researchers wanted to find out how often young people used social media sites like Facebook，Twitter and etc..For the study，they gave questionnaires to nearly 1，800adults，aged 19to 32．On average，members of the study group used social media sites one hour a day．They also visited various social media accounts 30times per week．Thirty percent of the study's participants reported having serious problems with sleeping．Those people who used social media a lot were three times more likely to have a sleep disorder．And those who spent the most time on social media were two times as likely to suffer from sleep disturbances．
Frequent checking is big part of the problem．Levenson said the number of times a person visits social media is a better predictor of sleep problems than overall time spent on social media．If this is true，she adds，then practices that stop such behaviors may be most effective．
Researchers say social media can influence sleep patterns in a number of ways．People can lose sleep by staying up too late looking at social media．Sensitive issues argued about on social media can cause"emotional，cognitive or physiological"excitement．Using an electronic device can disturb a body's natural sleep rhythms because of the light coming from cell phones or computer screens．The researchers note that in some cases，young adults who have a hard time sleeping may use social media to help them fall asleep．
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68．From the results of the questionnaire，who are more likely to have a sleep problem？B
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B．The participants visiting social media frequently．
C．The participants using social media sites one hour a day．
D．The participants spending the most time on social media．
69．The main purpose of the passage is toC．
A．compare and evaluate
B．examine and reason
C．inform and explain
D．argue and conclude
70．What is the best title for the passage？A
A．Social Media Is Keeping Young Adults Awake
B．Difficult Sleeping Is Affecting Sleeping Patterns
C．Electric Devices Are Influencing Sleep Rhythms
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8．Time for Guan Tianlang to get back to his middle school．He already got an"A"for his first Masters Golf Tournament at the Augusta National Golf Club（奥古斯塔国家高尔夫俱乐部）in America last week．
The 14-year-old amateur （业余爱好者） from China has become the youngest golfer to play in the Masters．He also made the cut to compete against the best professional golfers in the world．Some of them are old enough to be his father!
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A  the UK
B  China
C  Australia
D  America
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A  Terrible．
B  Ugly．
C  Wonderful．
D  Boring．
31．What kind of medal did Guan Tianlang get？B
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B  a Silver Cup
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12．Some people like dogs______ others like cats．（　　）

2．It is too late to leave，_____，we have much more work to do here．（　　）

9．An egg sinks to the bottom if you drop it into a glass of ordinary drinking water but what happens if you add salt？The results arc very interesting and can teach you some fun facts about density（密度）．
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*One egg*Water*Salt*A tall drinking glass
     Instructions：
     Pour water into the glass until it is about half full．
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21．Which of the following is the CORRECT order？B
①Mix in lots of．salt．
②Gently lower the egg into the water．
③Carefully pour in plain water until the glass is nearly full．
④Pour water into the glass until it is about half full．
A．④②①③B．④①③②C．①④③②D．③④①②
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C．Nothing will happen．
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D．The result is not known．
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B．Because ordinary tap water is as dense as salt water．
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