______your opinions are worth considering,the president finds it unwise to place too much importance on them.
A.As B.Since C.When D.While
______your opinions are worth considering,the president finds it unwise to place too much importance on them.
A.As B.Since C.When D.While
D
考查状语从句。while 引导让步状语从句，意思是“尽管”。