You won’t feel happy at school___________ you get on well with your classmates.
A. though          B. unless         C. because
B

试题分析:句意为:在学校你不会开心,除非你与同学相处融洽。though:虽然、尽管, unless:除非、如果不, because:因为。根据语境可知应选B。
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