5. A new enthusiasm for eating emerged in Britain ______.
D
[解析] 题目问:什么时候出现了一种新的饮食热潮?最后一段Food rationing continued in Britain until the early 1950s. It was only after this had stopped, and buyer, eggs and cream became more plentiful, and it was possible to travel abroad again and taste other ways of preparing food, that the English difference to eating became replaced by a new enthusiasm for it.通过这句话可知,20世纪50年代以后,在英国产生了新的饮食热潮。据此判断,应选择D。