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单选题 What can some drags do?（）。
A.They can certainly reduce the risk of future heart problems greatly.
B. They can greatly reduce some patients’ risk of future heart problems.
C. They can greatly reduce the risk of certain heart problems.
D. They can greatly reduce patients’ risk of future heart problems.
正确答案：B
答案解析: 录音中提到“Some drugs can, in certain patients, markedly reduce the risk of future heart problems.”，意思是：一些药物在一些特定病人身上可以明显减少未来患心脏病的风险，C项的表达与此一致。
【录音原文】Some drugs can, in certain patients, markedly reduce the risk of future heart problems.
相关知识：2 单句
