the amazon is shorter than the nile 那the amazon isn't () () (）the nilethe amazon isn't (as) (long) (as）the nile确定正确？ever seen是什么？never seen是什么？解释啊！好的，提高悬赏值seen 是see的过去分词have ever seen曾经看见过have never seen 从没看见过谢谢了！我终于遇到好人了！！(*^__^*) 嘻嘻……