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(2021·太原模拟)In an effort to inform our citizens of clearing the street snow, the city adopts a snow removal plan.
Routes used by City Emergency Services come first. Secondly, connector streets will be cleared which allow citizens the greatest access to public roads. And thirdly, roads within neighborhoods will be cleared.
Snow removal and ice control will start when：
•Snow accumulates 4 inches or more.
•Weather conditions do not endanger the safety of road crew.
•Snow falls during peak traffic periods of heavy use of main streets.
Snow and ice removal will be delayed or cancelled when：
•There is severe cold, significant wind and limited visibility.
•The snowfall occurs on the weekend or a holiday and is not considered a threat to public safety. In that case, snow and ice removal may take place on the next normal weekday.
•Snow and ice may be left on roadways if melting is obvious.
Your cooperation is requested during snow removal and these suggestions may apply：
•Limit travel during storms. Travel is possible once roads have been cleared or salted by the road crew.
•Avoid removing snow from your driveways into the road. Pile the snow in your yard.
•Park your vehicles in your driveways and off the road or walkways.
•Keep public sidewalks next to your house clear of snow and ice.
•Be responsible for removing the snow which is thrown by the snow plough (扫雪机) from your driveways. Hopefully, you can understand this inconvenience.
语篇解读：本文是一篇应用文，介绍了市民铲除街道积雪的公告，包括铲雪的顺序、开始铲雪的时间、推迟或取消铲雪的时间以及市民配合铲雪的措施等。
1．When will the snow have to be removed?
A．If it reaches a certain thickness.
B．If the main streets are not busy.
C．If the snow and ice begin to melt.
D．If extreme weather makes roads dangerous.
解析：选A 细节理解题。根据Snow removal and ice control will start when：部分第一条“Snow accumulates 4 inches or more”可知，积雪达到或者超过四英寸时需要铲雪，故A项正确。
2．What should citizens do to cooperate in the snow removal?
A．Help to put the salt on the road.
B．Pile the snow nearby to the road.
C．Throw the snow into the driveways.
D．Clear the sidewalks close to their houses.
解析：选D 细节理解题。根据Your cooperation is requested during snow removal and these suggestions may apply：部分第四条“Keep public sidewalks next to your house clear of snow and ice”可知，市民应当清扫他们家附近的人行道以配合铲雪工作，故D项正确。
3．What can we learn from the text?
A．Clearance of emergency routes has a priority.
B．Snow and ice must be removed on the weekends.
C．Citizens play the most important role in the snow removal.
D．The poster is to inform citizens of an oncoming heavy snow.
解析：选A 细节理解题。根据第二段第一句“Routes used by City Emergency Services come first”可知，应当优先清扫城市应急通道，故A项正确。
