It have been Tom that parked the car here as he is the only one with a car.A. mayB. mustC

问题补充：

It have been Tom that parked the car here, as he is the only one with a car.

A. may

B. must

C. can

D. should

答案：

A. may

(答案→)B. must

C. can

D. should

解析：此处may 可能，表示可能性最小的推测； must 一定，必须； can能，可能。表示理论上的可能性；should应该，表示情理之中的事情。句意：一定是Tom把车停在这了，因为只有他才有车。根据句意表示可能性最大的推测，用must。故选B。