if I had worn my overcoat,I_____cold

题目

if I had worn my overcoat,I_____cold
A:willnot have caught
B:coldnot have caught
C:willnot catch
D:wouldnot catch

答案

B 这是一个和过去事实相反的虚拟语气.主句应该用情态动词的完成时.
如果我穿大衣的话,我就不会感冒了.