2. 公务员
  3. Sam drove his car and hurried to the airport with me. It______at least 130 kilometers an hour on the highway.

Sam drove his car and hurried to the airport with me. It______at least 130 kilometers an hour on the highway.

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问题 Sam drove his car and hurried to the airport with me. It______at least 130 kilometers an hour on the highway.
选项 A、should have been driving
B、must have been driving
C、could have driven
D、would have driven
答案B
解析 句意：萨姆开车和我赶去机场。在高速上他的车一定至少以每小时130公里的速度行驶着。前一句使用了一般过去时陈述事实，由此可知后一句是对过去事情的肯定推测，情态动词需用must，而must have been doing表示对一直发生事情的推测。A项表示“本应该……”；C项表示“本能够……”；D项表示“本将……”均不合题意。所以本题的答案选B。
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