I can't thank you much because without your help I have won the first prize.A. too; woul

问题补充：

I can thank you much because without your help I have won the first prize.

A. too; wouldn

B. very; shouldn

C. that; might not

D. so; couldn

答案：

(答案→)A. too; wouldn

B. very; shouldn

C. that; might not

D. so; couldn

解析：句意：我再怎么感谢你也不为过，因为要是没有你的帮助，我就不能赢得第一名。not… too much都不过分；without your help这是一个条件，主干是对过去的虚拟，故选A。