I’m concerned, we are going to take an exam in a month.
A. As long as
B. As far as
C. Just as
D. Even if
网友回答
A. As long as
(答案→)B. As far as
C. Just as
D. Even if
解析：考查连词短语：A. As long as只要，B. As far as据…就…C. Just as就像，D. Even if即使，句意：据我所知，这个月我们要参加考试。As far as I’m concerned据我所知。选B。