Although doctors have been thus far successful at ______ the spread of tuberculosis in the United States, they are nonetheless concerned that ______ strains of the disease may yet arise.
A、marginalizing, innocuous
B、controlling, virulent
C、obscuring, indifferent
D、imperiling, responsive
E、dismissing, required
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试题解析
对医生来说,减缓或防止疾病传播是成功的事。然而他们担忧危险的压力可能出现。marginalize“使不相关”。innocuous“无害的”。virulent意为“危险的”。obscure“掩盖”。indifferent“漠不关心的”。imperil“危及,使陷入危险”。故选B。