(单词翻译:单击)
听力文本：
Canadian police and military teams were working Tuesday afternoon to rescue about 300 people stranded after what a local official termed "the most brutal storm to hit the Ontario region in 25 years".
一场被安大略当局称为“25年来最为凶残的暴风雪”过后，加拿大警方和军队在周二下午正对被困的300位市民进行着救援工作。
Some people have been stuck in their vehicles for more than 24 hours following blinding snow that piled up so high it made it almost impossible to open vehicle doors.
这场弥漫的大雪很快堆积到了令车门无法打开的厚度，一些车主被困车内长达24小时。
Ontario Provincial police initially reported about 360 vehicles and about 300 people have been stranded near Sonia, Ontario, on Highway 402, a major thoroughfare linking the U.S.-Canada border to London, Ontario.
安大略省警方初步报道中称有360辆汽车和300位车主被困在了接近该省城市萨尼亚的402号省道上。402号省道是该省城市伦敦通往美加边境的一条主要走廊。
Some of those people have since been rescued but Sonia mayor, Mike Bradley, said it could be another 24 hours before everyone is taken to safety.
部分被困人士已经获救，但是萨尼亚市长说将所有人安全救出仍需24小时。
3.What did the rescue efforts mainly concentrate on?
3.救援行动的焦点是什么？
4.How long might the last group of people have been trapped in their vehicles before being rescued?
4.最后一批获救者还得被困车内多长时间？
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