the girl was too selfish and never thought of others, she wasn’t getting on well with her classmates.
A. Though
B. Unless
C. Since
D. Until
网友回答
A. Though
B. Unless
(答案→)C. Since
D. Until
解析：考查连词：A. Though虽然，B. Unless除非，C. Since自从，既然，D. Until直到，句意：既然这个女孩太自私了，从不想到别人，她和同学相处不好。选C。