Helen ______ with her class if she had been able to meet all of the course requirements in
已帮助 人
Helen ______ with her class if she had been able to meet all of the course requirements in time.
A．will graduate
B．would have graduated
C．would gradate
D．has gradated
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
从句中用了过去完成时hadbeenableto，根据句意可看出，这是对过去事实的虚拟，事实上，海伦当时没有完成课程要求，所以她当时就未能毕业。可见，“毕业”这一动作本应在过去已经完成的，故用“would+havegraduated”，答案为B。