“外不劳形于事，内无思想之患”（《素问·上古天真论》）的语法现象是（）

A.名词作状语

B.名词作动词

C.名词的使动用法

D.名词的意动用法

E.名词作定语

-The weather has been very hot and dry.    

-Yes. If it had rained even a drop, things would be much better now! And my vegetables _____.     [ ]

A. wouldn't die            

B. didn't die    

C. hadn't died              

D. wouldn't have died