【题目】If I where he lived, I a note to him.
A. knew; would send B. had known; would have sent
C. know; would send D. knew; would have sent
在线课程【答案】B
【解析】考查虚拟语气。句意：如果我早知道他住的地方，我会给他发个便条。由从句中的lived可知是对过去的假设，if从句要用过去完成时，主句要用would /could/might have done，故B正确。