问题
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She tried hard, ______ she was unsuccessful.A.thereforeB.butC.orD.unless
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__________ 查看材料A.andB.butC.orD.than
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Sister Wendy only eats plain food______she doesn t drink alcohol.A.andB.butC.whileD.yet
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58._________A. andB. soC. howeverD. therefore
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_________(53)A.or B.butC.nor D.besides
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_________(53)A.and B.butC.yet D.unless
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