A recent research shows that physical activity(體育活動(dòng)) may help students do better in their classes. The research comes because educators in some countries are reducing time for activities like P.E. class.
Researchers go over the results of fourteen studies. Twelve were from the United States, one from Canada and one from South Africa. The studies appeared between 2009 and 2013. They included more than 55,000 children, aged six to eighteen.
Thomas Singh, one of the researchers, says the studies showed a relationship between physical activity and scores on subjects such as math, English and reading. Ms. Singh offers some possible explanations (解釋):
“ There are, first, physiological (生理的) explanations, like more blood flow, and so more oxygen (氧氣) to the brain. Being physically active means there are more hormones（ 荷爾蒙） produced like endorphins ( 腦內(nèi)啡). And endorphins make your stress level lower and your mood improved, which means you will perform better in class. Also, students who take part in organized sports learn rules and how to follow them. This could improve their classroom behavior and help them know what they should do.
All in all, the finding tells us that physically active kids are more likely to do better in school. Ms. Singh says schools should consider the finding before they cut physical education programs. 
【小題1】What led the researchers to do the studies?

A．Schools’cutting physical activity. 
B．Their interest in physical activity. 
C．The tests including about 55,000 children. 
D．Kids’unsatisfying schooling performance. 
【小題2】How many countries took part in the studies?
A．14.  B．12 C．2.  D．3. 
【小題3】Which of the following is NOT one of the advantages of physical activity according to the passage?
A．Getting more blood flow.  
B．Better classroom behavior. 
C．Feeling relaxed and refreshed. 
D．Greater ability to organize activities. 


【小題1】A
【小題2】D
【小題3】C

解析試題分析：這篇短文主要介紹了一項(xiàng)關(guān)于體育運(yùn)動(dòng)對(duì)學(xué)生在校表現(xiàn)的影響的調(diào)查報(bào)告。報(bào)告中提到了，參加體育活動(dòng)有助于提高血液循環(huán)速度，改善課堂行為和提高學(xué)生組織活動(dòng)的能力。
【小題1】細(xì)節(jié)理解題。題干意為：是什么讓調(diào)查者做這項(xiàng)研究？根據(jù)短文第一段The research comes because educators in some countries are reducing time for activities like P. E. class.描述，可知是由于一些學(xué)校削減活動(dòng)課，如體育課的課時(shí)這件事導(dǎo)致了研究者做的這項(xiàng)研究。故選A。
【小題2】細(xì)節(jié)理解題。題干意為：多少個(gè)國(guó)家參與了這項(xiàng)研究？根據(jù)Twelve were from the United States，one from Canada and one from South Africa.描述，可知有美國(guó)，加拿大和南非三個(gè)國(guó)家參與了這項(xiàng)研究。故選D。
【小題3】細(xì)節(jié)理解題。題干意為：根據(jù)本文下列哪條不是體育運(yùn)動(dòng)的優(yōu)勢(shì)之一？根據(jù)短文倒數(shù)第二段描述，可知參加體育活動(dòng)有助于提高血液循環(huán)速度，改善課堂行為和提高學(xué)生組織活動(dòng)的能力。沒有關(guān)于體育活動(dòng)能讓人感到放松和神清氣爽的描述，故選C。
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