文档介绍：听力部分
Unidentified Flying Objects
There are many explanations for why UFOs visit the Earth. The most popular one is that they may contain visitors from other planets. To fly such an 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 aircraft may have landed on earth and the space visitors may be living amongst 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 to the clouds.
However, the exact cause of many sightings still remains a mystery.
1- 6- 11-15 ABDCC 16-20. ABBCD 21- 26-30. BAADC 完型部分
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[C]【解析】浏览全文可知，文章说的是文明驾驶，behind the wheel44开车符合句意。
[C]【解析】根据句意“开坦克凶猛是好事，但驾车时也这样就完全是......”，可知another符合句意。
[B]【解析】空格所在句前半句提到“你可能会容忍那些乱开车的怪人、那些粗鲁而不体谅人的司机”. 转折词but引出“如今懂礼貌的司机反倒是 B符合句意。exception to the rule“例夕卜”.强调懂礼貌的司机很少。
[A][解析】根据句意“也许要......一场，善待其他驾驶者'的运动了”，call for-需求，呼吁”符合句意。
[C][解析】作者提倡一场“善待其他驾驶者”的运动，目的是为了避免事情朝不良的方向发