問題詳情
30. Football teams don’t play in the Super Bowl championship _____ either the National or the American Conference.
(A) but they win
(B) unless they win
(C) unless they will win
(D) but to have won
參考答案
答案：B
難度：適中0.555556
統計：A(0),B(5),C(2),D(1),E(0)
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