(单选题)

56. （）

A.impediments

B.questions

C.damages

D.diseases

参考答案：A

参考解析：

考查名词辨析和上下文语境。句意：贾维斯认为，要想将发现成功用于治疗人类语言障碍上，可能需要数年之久。impediments意为“障碍，阻碍，口吃”；questions意为“问题”；damages意为“破坏”；diseases意为“疾病”。根据原文中“human speech”一词可知，此处表示“人类语言障碍，口吃”。故选A。

知识点：有选项完形填空英语专业基础知识完形填空教师招聘-小学英语

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