If you him yesterday you what to do now. A. asked … would knowB. had asked … would have

问题补充：

If you him yesterday, you what to do now.

A. asked … would know

B. had asked … would have known

C. asked him … know

D. had asked … would know

答案：

A. asked … would know

B. had asked … would have known

C. asked him … know

(答案→)D. had asked … would know

解析：本题考查虚拟语气。从句与过去事实相反用had done，主句与现在事实相反用would do。句意：如果你昨天问他，你现在就会知道发生了什么。