2. 考研
  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、has witnessed
B、was witnessed
C、witnessed
D、is witnessed
答案C
解析 句中空格后有宾语，可先排除表示被动的B、D两项。A、C两项的区别在于时态。根据主语the last half of the nineteenth century(19世纪后半叶)应选择过去时。
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