1.应该是 the boy refreshes the web page every other 6 munites.(every other 6 munites是每隔6分钟,every 6 seconds是每6秒。而且句子应该用一般现在时,所以是refreshes而不是refreshed)2.the girl tidies her room every 4 days.3.we take a trip every 3 months.4.how often do you take a trip?5.每隔四天,/ 每四天 是不一样的,每隔4天是every other four days。每4天是every four days。(望采纳)