Question

【题目】Paul, _______ for years to make money, finally paid off his debts.

A. struggled B. struggling

C. having struggled D. to struggle

Answer 1

【答案】C

【解析】

试题分析：考察完成时态。主句是过去时态。而从句的动作发生在主句之前，所以要用完成时态。