The last half of the 19th century ______ the steady improvement in the means of

游客2023-12-27  19

问题 The last half of the 19th century ______ the steady improvement in the means of travel.

选项 A、witnessed
B、has witnessed
C、is witnessed
D、was witnessed

答案 A

解析 时态用法根据主语the last half of the nineteenth century可以判断时间为过去时,主语和谓语witness(亲眼目睹)之间是主动关系,因此A为答案。
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