...'Joe and Lisa are on holiday in Japan.They've been to Japan once before.'可以说成'This is the second time they've been to Janpan.'
她们还在日本,还没回来不是吗?为什么用been to?
... window, otherwise it'll get too cold in here. 3)otherwise是副词,不可以连接句子,所以,这里应该去掉逗号“,”,变成:Shut the
window otherwise it'll get too cold in here. 对吗?上面的问题,我一直有疑问,麻烦老师讲解一下,谢谢。