2. 外语
  3. The last half of the nineteenth century______ the steady improvement in the means of travel.

The last half of the nineteenth century______ the steady improvement in the means of travel.

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问题 The last half of the nineteenth century______ the steady improvement in the means of travel.
选项 A、tested
B、proved
C、confirmed
D、witnessed
答案D
解析 witness vt．目击，亲眼见到，注意到；为……(签名)作证。test vt.试验，测验；检验。prove vt．证明，证实；结果是，原来是。confirm vt.证实，肯定；进一步确定；批准，确认。
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