It __________ Tom that parked the car he
问题:
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
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