30. The little boy won’t go to sleep ______________his mother tells him a story.(A) or (B) unless(C)

問題詳情

30. The little boy won’t go to sleep ______________his mother tells him a story.
(A) or
(B) unless
(C) but
(D) whether

答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)