without except but区别

这题要看上下文.如果只有前半句,那么B或C都是成立的.
但因为后半句说“她因为这个很不高兴”,那前半句一定是说这个结果不是Bella想要的结果.
All the roommates went to dance except Bella,是说 “除了Bella,大家都去了",那么Bella 没去是有可能她没想去.
All the roommates went to dance without Bella,是说“大家都去了,但没带着她去.”那么Bella 想去的,但是没去成,所以她不高兴了.

英语高手进！！without except but区别
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All the roommates went to dance _______ Bella last Sunday, which made he very unhappy.
A. but for B. except C. without D. but
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