单选题
He had studied hard, he would have been able to pass the exam.无
A、
He had studied harder
B、
If only he studied more
C、
Had he studied harder
D、
When he studied more
【正确答案】
C
【答案解析】
本句是虚拟语气， 从句省略“if”， 应用倒装语序， 将had提前。
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