If I hadn’t stood under the ladder to catch you when you fell you now.A. wouldn’t be smi

问题补充：

If I hadn’t stood under the ladder to catch you when you fell, you now.

A. wouldn’t be smiling

B. couldn’t have smiled

C. won’t smile

D. didn’t smile

答案：

(答案→)A. wouldn’t be smiling

B. couldn’t have smiled

C. won’t smile

D. didn’t smile

解析：考查混合虚拟。If I hadn’t stood under the ladder to catch you when you fell和过去事实相反，用过去完成时；you now.和现在事实相反，用wouldn’t+现在时态。选A。