【单选题】He had studied hard, he would have been able to pass the exam.
A.He had studied harder
B.If only he studied more
C.Had he studied harder
D.When he studied more
【单选题】He had studied hard, he would have been able to pass the exam.
A.He had studied harder
B.If only he studied more
C.Had he studied harder
D.When he studied more
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