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Junior school students in Harbin，Heilongjiang，had a "long weekend"．They had four days off from Oct．19-22．It was not for any festival，but was caused by serious smog．
The smog was caused by high levels of PM 2．5 in the air．
PM 2．5 is small particles（微粒） of pollution in the air with a diameter （直徑） of 2．5 micrometers or less．Waste gas from cars and factories is the biggest cause of PM 2．5 pollution． On Oct．17，the World Health Organization named air pollution a cause of cancer．
To better protect children，cities are taking action．
On Oct．21，Harbin Education Bureau decided to close primary and junior high schools for two days．
Beijing started a program on Oct．22 which has a warning system with four levels．The red warning is the highest warning level．It means that the next three days will see serious pollution．
When a red warning is issued（發布），schools will close．
If there's pollution that's not as serious，the Beijing Commission of Education will ask schools to stop PE classes and outdoor activities．
How will students be informed?
"First，the Commission of Education will inform schools online，" Ye Yan，head of Beijing Shijingshanqu Experimental Primary School，told Beijing Times．"Then teachers will text students’ parents．"
Will the days off affect the study plan?
"Missing school days will be made up during the summer or winter vacations，" said Wang Hao，a physical education teacher in Beijing Chaoyang district．
For students in Harbin who had the long weekend，they would go to school on the next two Saturdays．
根據材料內容選出最佳選項，并在答題卡上將該項涂黑。
小題1:Why did students in Harbin have a long weekend?

A．Because the weather was extremely cold．

B．Because a special festival came．

C．Because the winter vacation began．

D．Because there happened serious smog．

小題2:Which of the following is TRUE about PM 2．5?

A．It makes water polluted．

B．People can see it with eyes．

C．It only comes from factories．

D．It can cause serious diseases．

小題3:When a red warning is issued in Beijing，what will happen?

A．All of the work will be stopped．

B．People aren't allowed to go outside．

C．Schools will be closed for a few days．

D．Air pollution will be seen in a few weeks．

小題4:What does the underlined word "text" mean in Chinese?

A．寫信

B．發信息

C．寫文章

D．發郵件

小題5:What is the reading mainly about?

A．What PM 2．5 is made up of．

B．How people fight against air pollution．

C．What influence the smog brings to school．

D．How schools deal with the missing school days．

小題1:D
小題2:D
小題3:C
小題4:B
小題5:C

試題分析: 本文講述是某地的學生度過一個很長的周末，其實是受霧霾的影響，一旦發布紅色預警，學校就應停課，及采樣應采取的措施。
小題1:D 細節理解題。根據第一段提到It was not for any festival，but was caused by serious smog．不是因為節日而是由嚴重的霧導致的，故選D項。
小題2:D 細節理解題。根據第三段提到Waste gas from cars and factories is the biggest cause of PM 2．5 pollution． On Oct．17，the World Health Organization named air pollution a cause of cancer這種廢氣來自汽車，工廠，世界衛生組織宣布這種空氣污染是致癌的原因，故選D項。
小題3:C 細節理解題。根據第第七段提到When a red warning is issued（發布），schools will close當紅色預警時，學校應該關閉。故選C項。
小題4:B 細節推斷題。根據第十段提到First，the Commission of Education will inform schools online，" Ye Yan，head of Beijing Shijingshanqu Experimental Primary School，told Beijing Times．"Then teachers will text students’ parents．首先教育部會網上通知學校，老師再通過短信通知學生家長，故選B項。
小題5:C 主旨大意。文中第一句話提到Junior school students in Harbin，Heilongjiang，had a "long weekend"初中的學生有了一個很長的假期，提到霧霾的影響，根據第四段提到To better protect children，cities are taking action為了更好的保護學生，各個城市應采取措施，故可知這是說霧霾對學校的影響，故選C項。

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