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
网友回答
A. may be
B. might have been
(答案→)C. must have been
D. could be
解析：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