So suddenly that I hadn’t prepared for it. What a pity I had let it go!A. the chance came

问题补充：

So suddenly that I hadn’t prepared for it. What a pity I had let it go!

A. the chance came

B. the chance would come

C. did the chance come

D. would the chance come

答案：

A. the chance came

B. the chance would come

(答案→)C. did the chance come

D. would the chance come

解析：考查倒装句，So + 形容词或副词，放在句首时使用本部分倒装，根据时态应用过去式，句意：这个机会来的如此突然以致于我没有做好准备。多么遗憾呀我失去了这次机会。所以选C。