5．阅读下面的短文，请根据短文后的要求答题（请注意问题后的字数要求）．
In a study likely to make school staff amazed，U．S．researchers said that chewing gum may help academic performance in teenagers rocket to a higher level．
Many US schools ban chewing gum because children often dispose of the sticky gum under chairs or tables．But a team found that students who chewed gum during math class had higher scores on a standardized math test after 14 weeks and better grades at the end of the term than students in the class who did not chew gum．
"For the first time we've been able to show in a real-life kind of situation that students did perform better when they were allowed to chew，"said Gil Leveille，a researcher．"Wrigley has gotten feedback （反馈）from many of its gum customers who say chewing gum helps them stay focused．"
The researchers studied four math classes or 108 students aged 13 to 16 years old from a school．About half got free Wrigley's sugar-free gum to chew during class，homework and tests．They chewed at least one stick of gum 86 percent of the time they were in math class and 36 percent of the time they were doing homework．The other half went without．After 14 weeks，the gum chewers had a three percent increase in their math scores on the Texas Assessment of Knowledge and Skills achievement test．
Another Wrigley-funded study found that college students in a lab who were given difficult computer tasks had lower levels of the stress when they were chewing gum compared to when they were not．Leveille said he thinks chewing gum helps reduce stress so students can do their best work．While he is aware that many schools have a dim view of students'chewing gum in class，he hopes the findings may change that a bit．"It's not a matter of chewing．It's a matter of gum disposal，"Leveille said，adding that that can be overcome by teaching proper disposal behaviors．
71．What does the underlined word"rocket"mean？（No more than 3 words）To achive quickly．
72．Why is chewing gum forbidden in many U．S．schools？（No more than 10 words）Because the students often throw the sticky gum under chairs or tables．
73．What feedback has Wrigley gotten about chewing gum according to the passage？（No more than 5 words）It helps stay focused．
74．What does Leveille think of the effects of gum-chewing？（No more than 15 words）Chewing gum helps reduce stress so students can do best of their work．
75．Do you agree that ban on chewing gum in class should be removed？Why or why not？（No more than 20 words）Yes，I do．because chewing gum help students focus on study and reduce stress．
No，I donot．because chewing gum may disturb the academic atmosphere of class and gum chewers may throw gum sticks here and there．．
分析 研究人员认为咀嚼口香糖可以帮助学生减少压力，并提高成绩．
解答 71．To achive quickly．猜测词意题．根据 chewing gum may help academic performance 可知，咀嚼口香糖帮助学生学业成绩，所以rocket此处是动词，表示快速取得好成绩．
72．Because the students often throw the sticky gum under chairs or tables．概括归纳题．根据第二段第一句话Many US schools ban chewing gum because children often dispose of the sticky gum under chairs or tables可知，美国学校禁止学生吃口香糖，因为学生会将口香糖扔在桌椅底下．
73．It helps stay focused．细节题．根据Wrigley has gotten feedback （反馈）from many of its gum customers who say chewing gum helps them stay focused．"可知，咀嚼口香糖有助于集中注意．
74．Chewing gum helps reduce stress so students can do best of their work．细节题．根据Leveille said he thinks chewing gum helps reduce stress so students can do their best work推出，咀嚼口香糖可以帮助减少压力．
75．Yes，i do．because chewing gum help students focus on study and reduce stress．
No，i donot．because chewing gum may disturb the academic atmosphere of class and gum chewers may throw gum sticks here and there．考查态度题．主要根据文章内容 可以发表自己的观点，只要符合要求均可以．
点评 做阅读表达题时，理清文章的脉络、掌握文章的主旨大意，并能运用简洁的语言表达．回答要有针对性观点要明确．不要摘抄文章原句．
