walk on ice 还是 walk in ice?

walk on ice 还是 walk in ice? You should walk slowly on the ice.改为祈使句 It is d____to walk on the thin ice. The ice is _________ to walk across in the winter. The ice is too thin for you to walk on .等于The ice is so thin The ice is too thin for you to walk on.(被动语态) The ice is__ _ on the ice还是on ice whenever you are to walk on the ice,_that it is solid and sa The ice is to slippery to walk on it.后为什么加it We warned the children not to walk on the thin ice. the ice is hard enough to walk across in the winter翻译 the ice is too hard to walk across in the winter翻译