2. 外语
  3. UFOs There are many explanations for why UFOs visit the Earth. /The most popular one is that they may be visitors from othe

UFOs There are many explanations for why UFOs visit the Earth. /The most popular one is that they may be visitors from othe

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答案 UFOs There are many explanations for why UFOs visit the Earth. /The most popular one is that they may be visitors from other planets. /To fly such aircraft, their builders must develop different forms of aviation, /because they seem to fly much faster than normal aircraft. /The UFOs, it is believed, must contain scientists/from other planets who are studying life on earth. /It is even believed that several such aircrafts may have landed on earth/and the space visitors may be living among us./ But there are also less fantastic explanations available. /Although some sightings of UFOs are difficult to explain, most can be explained quite easily. /In many cases the observers might have made a mistake. /They might have seen a weather balloon or an aircraft. /Or the light they saw in the sky might have been light from the ground, /reflected on the clouds. /However, the exact cause of many sightings still remained a mystery.
解析 本文的难点主要是表示推测的几个句子。第一段最后一句中several such aircrafts may have landed on earth和第二段第三、四、五句中的might have+V-ed可能会给听写造成困难，因为表示对过去的推测时have都轻读，[h]的读音省，与前面的情态动词连读。如果不熟悉这一语音现象，错误很可能就会发生。补救的措施是进行快速的语法分析。
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