Thank you very much. Without your help I the exams.A. could not passB. could not have pas

问题补充：

Thank you very much. Without your help, I the exams.

A. could not pass

B. could not have passed

C. did not pass

D. could not passed

答案：

A. could not pass

(答案→)B. could not have passed

C. did not pass

D. could not passed

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