【题目】沿着长城，每隔几百米就有一个烽火台。
along the Great Wall, there was a watching tower.

【答案】Every few hundred metres/ Every several hundred metre
【解析】分析题干，“几百米”的表达为“few hundred metres”或“several hundred metres”，注意hundred后不加s. 所以答案是Every few hundred metres/ Every several hundred metres.