我还是不能理解这句话Why is it that some nations have disappeared altog

Why is it that some nations have disappeared altogether? 句子解析 why is it some nations have disappeard altogether is seems that she disappeared这句话对吗 Why is it that some people seem to have it all together whil 这句话怎么理解it is simple enough to say that since books have clas That is why some countries have whaled for commercial prupos it is not easy.这句话应该怎么问 why is it not easy?还是 why isn't it e It's possible that you will have some trouble .这句话里that 后的句子 谁知道The stars in the sky when it disappeared? 这句话怎么理解?有什么含义?发 why it is 还是why is it that is why they have to stay in cages 这句话怎么来解答它? it is no wonder 后用why还是that?