By the end of last month, they _________ five bridges.
分类: 基础英语(00088)发布时间: 2024-08-26 05:33浏览量: 1
By the end of last month, they _________ five bridges. A、build B、built C、have built D、had built 【正确答案】：D 【题目解析】：由于时间是by the end of last month意为“到上个月末为止”，句子要用过去完成时。