Mr. Brown a good friend of mine us but that he was short of money at the time.A. would

问题补充：

Mr. Brown, a good friend of mine, us but that he was short of money at the time.

A. would help

B. would have helped

C. had helped

D. helped

答案：

A. would help

(答案→)B. would have helped

C. had helped

D. helped

解析：but that 引导的从句表示假设条件，谓语用陈述条件。例如：But that he was prevented, he would have accomplished his design.