单选题 19.  As far as the method itself ______, it is worth trying.
【正确答案】 C
【答案解析】[考点] 词语搭配
as far as sth. is concerned是固定搭配，意为“就……而言”，符合题意。故选C。
   就这个方法自身来说，它值得一试。