问题
选择题
It __________ Tom that parked the car here, as he is the only one with a car.
A．may be
B．might have been
C．must have been
D．could be
答案
答案：C
题目分析：考查推测，might have done表示对过去事情不肯定推测； must have done表示对过去事情肯定推测；could have done表示表示过去未实现的动作，由后面的句子as he is the only one with a car可以知道是肯定推测，所以选C
点评：推测是常考内容，要知道它们表示的是什么意思，遇到此类题时，就很容易做出正确选择