企源知识库

I would go and inform him if I ______ his address.
A、know
B、had known
C、knew
D、would have known
【正确答案】：C
【题目解析】：本题考查虚拟语气。由题干主句可知本题考查的是与现在事实相反的虚拟语气。那么，根据公式，表示与现在事实相反的情况，从句：主语+过去时，主句：主语+should/would/could/might+do,故只有C正确。答案为C。