--Has he passed the exam yet? ---No,He _
问题:
--Has he passed the exam yet? ---No,He ___ it if he had studied harder.
A.would pass
B.passed
C.should has passed
D.would have passed
--Has he passed the exam yet? ---No,He ___ it if he had studied harder.
A.would pass
B.passed
C.should has passed
D.would have passed