题目

.He was told that it would be at least three more monthshe could recover and return to work. A.when    B.before    C.since    D.that 答案:B 解析: B。由语境逻辑可以推出在他恢复健康重新工作之前要过至少三个月,因此该空应填before引导时间状语从句。(2009?赣州)已知甲的血型为A型,乙的血型为AB型,丙的血型为B型,丁的血型为0型.此四人结伴而行,途中甲受重伤急需输血,同伴中可以为甲提供血液的是(  )A.乙B.丙C.丁D.乙、丙都可以
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