It________ have been Tom who parked the car like that, as he’s t

It________ have been Tom who parked the car like that, as he’s the only one who can drive.
A、must
B、need
C、should
D、ought to
【正确答案】：A
【题目解析】：must后接动词的完成式，表示对过去的情况做推测。原句的意思是“一定是Tom那样停的车，因为只有他会开车”。因此我们选择A. must。