---The computer cost him 20, 000 dollars
问题:
---The computer cost him 20, 000 dollars. ---It ____ be that expensive.It’s a used computer.
A.may not
B.can’t
C.mustn’t
D.needn’t
---The computer cost him 20, 000 dollars. ---It ____ be that expensive.It’s a used computer.
A.may not
B.can’t
C.mustn’t
D.needn’t