since while做状语从句连接词 your opinions are worth considering,the committee finds it unwise to place too much importance on them. A.As B.Since C.Provided D.While since作为连接词也有虽然的意思为什么不选since
前后两个句子意思是反的~ your opinions are worth considering 你的观点值得考虑 the committee finds it unwise to place too much importance on them (然而)认为把太多精力花在上面不明智~ While 然而~(转折) since 因为(因果关系)