3．Getting back to nature is good for your mental health，according to new research．
Nearly 80 percent of the（11）Ain middle-and high-income countries live in cities，（12）Cworry is a major public health concern．Parks，gardens and natural（13）Bare not always nearby．
Some studies have（14）Dthat there is a relationship between green space and（15）B，but researchers have not confirmed a cause and effect link．So Mathew R．White and colleagues（16）Athe University of Exeter decided to try to pin it down．
They（17）Cthe metal health of hundreds of Britons who had moved from a grey city neighborhood to a greener one with（18）Dwho had moved oppositely．
Looking at the data over the（19）Aof five years，they found that people who had moved to a greener area were happier-and stayed happier-after their move．
In a report in the journal Environmental Science & Technology，the researchers（20）C，"Environmental policies to increase urban green space may have continuable public health benefits．"
Nearly 80 percent of the（11）Ain middle-and high-income countries live in cities，（12）Cworry is a major public health concern．Parks，gardens and natural（13）Bare not always nearby．
Some studies have（14）Dthat there is a relationship between green space and（15）B，but researchers have not confirmed a cause and effect link．So Mathew R．White and colleagues（16）Athe University of Exeter decided to try to pin it down．
They（17）Cthe metal health of hundreds of Britons who had moved from a grey city neighborhood to a greener one with（18）Dwho had moved oppositely．
Looking at the data over the（19）Aof five years，they found that people who had moved to a greener area were happier-and stayed happier-after their move．
In a report in the journal Environmental Science & Technology，the researchers（20）C，"Environmental policies to increase urban green space may have continuable public health benefits．"
| 11．A．population | B．workers | C．employees | D．folk |
| 12．A．which | B．that | C．where | D．when |
| 13．A．energies | B．spaces | C．climates | D．matters |
| 14．A．advised | B．discussed | C．submitted | D．suggested |
| 15．A．game | B．happiness | C．time | D．hobby |
| 16．A．from | B．by | C．with | D．into |
| l7．A．experimented | B．combined | C．compared | D．explained |
| 18．A．others | B．ones | C．all | D．those |
| 19．A．course | B．distance | C．history | D．effort |
| 20．A．calculate | B．imagine | C．conclude | D．doubt． |
2．While many young people were enjoying the final weeks of summer vacation，Zach，Bonner was working his hardest． He started （11）B from Valrico，Florida，his hometown，on Christmas，2009，and stepped over the Los Angeles city line nine months （12）Cin September，covering a total of 2，478 miles and（13）Aclose to 120，000 for kids in need．A1ong the way，Zach attended school online，thanks to his mother，Laurie Bonner，and brother and sister，who （14）Dwalking and driving alongside him．
Despite his age，Zach has a long（15）Bof helping others． When Hurricane Charley hit town in 2004，Zach，then six，pulled a wagon through his neighborhood （16）D food for storm victims． Since then，he has raised some 400，000 for his Little Red Wagon Foundation，which gives money to projects helping homeless （17）B，In 2007，Zach began walking to support．a children's charity in Florida，finishing his（18）D23 days later，280 miles away in Tallahassee．Then in the summer of 2009，he walked about 670 miles from Atlanta to Washington，D．C．，in just two months．
"What，really （19）Ame going i8 these kids，"Zach has said．"They don't have to say，‘I'm （20）Cof being homeless．'So why should l get to quit？"
Despite his age，Zach has a long（15）Bof helping others． When Hurricane Charley hit town in 2004，Zach，then six，pulled a wagon through his neighborhood （16）D food for storm victims． Since then，he has raised some 400，000 for his Little Red Wagon Foundation，which gives money to projects helping homeless （17）B，In 2007，Zach began walking to support．a children's charity in Florida，finishing his（18）D23 days later，280 miles away in Tallahassee．Then in the summer of 2009，he walked about 670 miles from Atlanta to Washington，D．C．，in just two months．
"What，really （19）Ame going i8 these kids，"Zach has said．"They don't have to say，‘I'm （20）Cof being homeless．'So why should l get to quit？"
| 11．A．touring | B．walking | C．driving | D．riding |
| 12．A．ago | B．away | C．1ater | D．over |
| 13．A．raising | B．earning | C．making | D．saving |
| 14．A．put on | B．gave up | C．set about | D．took turns |
| 15．A．impression | B．history | C．motivation | D．attempt |
| 16．A．cooking | B．offering | C．seeking | D．collecting |
| 17．A．patients | B．children | C．beggars | D．women |
| 18．A．distance | B．vacation | C．movement | D．journey |
| 19．A．keeps | B．catches | C．leaves | D．stops |
| 20．A．excited | B．fond | C．tired | D．proud． |
1．
Long after the 2010 World Cup was won，disappointed fans were still criticizing the unfair refereeing （裁判） decisions that denied victory to their team．A researcher was （41）E to study the performance of some top referees（裁判）．
The researcher organized experimental matches which （42）A four youth teams．Each match lasted an hour，divided into three periods of 20minutes during which different referees were in （43）K．
Observers noted down the referees'errors，of which there were 61over the matches．When （44）G into a standard match of 90minutes，each referee made almost 23mistakes，a（n） （45）Ihigh number．
The researcher then studied the videotapes to have a detailed analysis of the matches，and （46）J are that the errors were more likely when the referees were close to the incident．When the officials got it right，they were，on average，17meters away from the action．The average distance in the case of errors was 12meters．The research （47）B show that the best distance is about 20meters．
There also seemed to be an （48）H speed．Correct decisions came when the referees were moving at a speed of about 2meters per second．The （49）F speed for errors was 4meters per second．
If FIFA，football's international ruling body，wants to improve the standard of refereeing at the World Cup，referees should be （50）D into the rule of keeping their eyes on the action from a distance，rather than rushing to keep up with the ball，the researcher argues．
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| A．involved B．figures C．inevitably D．initiated E．appointed F．average G．transformed H．reasonable I．remarkably J．indications K．charge |
The researcher organized experimental matches which （42）A four youth teams．Each match lasted an hour，divided into three periods of 20minutes during which different referees were in （43）K．
Observers noted down the referees'errors，of which there were 61over the matches．When （44）G into a standard match of 90minutes，each referee made almost 23mistakes，a（n） （45）Ihigh number．
The researcher then studied the videotapes to have a detailed analysis of the matches，and （46）J are that the errors were more likely when the referees were close to the incident．When the officials got it right，they were，on average，17meters away from the action．The average distance in the case of errors was 12meters．The research （47）B show that the best distance is about 20meters．
There also seemed to be an （48）H speed．Correct decisions came when the referees were moving at a speed of about 2meters per second．The （49）F speed for errors was 4meters per second．
If FIFA，football's international ruling body，wants to improve the standard of refereeing at the World Cup，referees should be （50）D into the rule of keeping their eyes on the action from a distance，rather than rushing to keep up with the ball，the researcher argues．