[ ] you study harder,you will never pass the final exam a if b until c unless d except

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[ ] you study harder,you will never pass the final exam a if b until c unless d except

[ ] you study harder,you will never pass the final exam a if b until c unless d except
[ ] you study harder,you will never pass the final exam a if b until c unless d except

[ ] you study harder,you will never pass the final exam a if b until c unless d except
C
unless 除非,
除非你学习更加努力,否则你将通不过期末考试

选C unless=if ... not

c