[D74] The little boy won't go to sleep ______ his mother tells him a story.
问题描述：
[D74] The little boy won't go to sleep ______ his mother tells him a story.
A.or B.unless
C.but D.whether
翻译并分析.
答
小男孩不想睡觉除非他妈妈讲故事给他
unless 除非
通过意思就看出答案.另外这句话是前面主句是将来时后面是现在时,所以两个句子不能选择or,but这种并列连词.然后根据语义排除d