对凝血酶敏感的凝血因子包括（）

A.FⅠ、FⅤ、FⅧ、FⅩⅢ

B.FⅢ、FⅣ

C.FⅡ、FⅦ、FⅨ、FⅩ

D.FⅡ、FⅢ、FⅣ、FⅦ

E.FⅠ、FⅢ、FⅤ、FⅫ

I'll go out for a walk after supper if it _________rain.  [ ]

A. didn't            

B. won't  

C. isn't              

D. doesn't