填空题
If the streets had been clearly marked, it would
1
us so long to his house.
1、
【正确答案】
1、not have taken
【答案解析】
解析： If the streets had been clearly （明朗的）marked（记号）, it would not have taken us so long to his house. 如果街道已明确标记，它是不会花了我们这么多的时间到他家
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