题目

Scientists are trying their best to　　　　　ways to treat the terrible disease called H7N9. A. come up with                     B. look forward to C. talk about                           D. give up 答案：A。考查短语动词辨析。句意: 科学家们正在尽最大努力想出治疗被称为H7N9的严重疾病的办法。come up with想出; look forward to盼望; talk about谈论; give up放弃。故选A。

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