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86. In 2000, a mere twodozen products accounted for half the increase in spending on prescriptiondrugs, a phenomenon that is explained not just because of more expensivedrugs but by the fact that doctors are writing many more prescriptions forhigher-cost drugs.
答案是:(B) a phenomenon that is explained not just bythe fact that drugs are becoming more expensive but also by the fact thatdoctors are writing
那个not only .... but also不是固定搭配吗?
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