.23.Whenrecipesforicedteaappearedinafewlate-nineteenth-centurycookbooks,thedrinkdidnotbecomepopularuntilthe1904world'sfair.开头的when错了怎么改、

Question

.
23.When recipes for iced tea appeared in a few late-nineteenth-century cookbooks,the drink did not become popular until the 1904 world's fair.开头的when错了怎么改、

Answer 1

改成though
因为感觉是转折的关系...