-- Can I join their club?
-- I am afraid you will be refused you’ve passed all their tests.
A. if
B. although
C. unless
D. since
网友回答
A. if
B. although
(答案→)C. unless
D. since
解析：考查连词：句意：--我能加入他们的俱乐部吗？--恐怕你会被拒绝，除非你通过他们的测试。unless，引导的条件状语从句，表示if···not。A是如果，B是虽然，D是既然，自从。不符合题意。故选C