But for the help of my English teacher Ithe first prize in the English Writing Competition

问题补充：

But for the help of my English teacher，Ithe first prize in the English Writing Competition.

A. would not win

B. would not have won

C. would win

D. would have won

答案：

A. would not win

(答案→)B. would not have won

C. would win

D. would have won

解析：考查含蓄条件的虚拟语气。本题是一个含蓄的虚拟语气句，其条件是有介词短语but for表示出来。句意：要不是英语老师的帮助，我本不会在英语写作大赛里得到第一名。根据句意说明是对过去情况的说明，故使用“情态动词+have done”的形式。根据句意说明B正确。

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