【题目】假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。 温馨提醒：改错题需按要求规范答题，否则不能得分！
增加：在缺词处加一个漏字符号(Λ)，并在其下面写出该加的词。
删除：把多余的词用斜线(\)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词;
2. 只允许修改10处，多者(从第11处起)不计分。
Ladies and gentlemen, today I’m going to share something amazed about dolphins. For ages, the sailors have said that it is good luck to see dolphins swimming alongside boats. Their presence meant that land is near, which will be vital informations if a boat and its crew are in danger. Some dolphins have even protected sailors which suffer shipwreck from sharks. There is no wonder that these unique and fascinating creatures have long known as our friends.
Dolphins are thought to be intelligent animals because of its quick ability to learn. They seem to communicate with each other through a combination of whistles and clicks. While scientists don’t know exact what they are talking about, it is thought that dolphins are telling each other that food is nearby, or warn each other of approaching danger.
在线课程【答案】
【解析】本文是一篇关于海豚的演讲，海豚是一种聪明的动物。
“ I’m going to share something amazed about dolphins.”，一般来说修饰人的时候用amazed，修饰物的时候用amazing。句中是要修饰something。故将amazed改为amazing。
考查时态。“For ages, the sailors have said that it is good luck to see dolphins swimming alongside boats.”，多年来，水手们都说看到海豚在船边游泳真是幸运。可知此处应使用过去式。故将 have 删去。
“Their presence meant that land is near”他们的存在意味着陆地接近，是叙述客观事实，不考虑时态。Their presence 不可数，位于动词要用单数形式。故将meant改为means。
“which will be vital informations if a boat and its crew are in danger. ”， information是不可数名词，所以不能加s。故将 informations 改为 informations 。
“Some dolphins have even protected sailors”，一些海豚被水手保护。 Have been protected被保护。故将 even改为been。
“Some dolphins have even protected sailors which suffer shipwreck from sharks. ”，“which suffer shipwreck from sharks.”为定语从句，先行词 sailors 指人，所以此处要用who引导定语从句。故将which改为who。
考查固定用法。 It is no wonder that ……是不足为奇的。故将 There 改为 that 。
“Dolphins are thought to be intelligent animals because of its quick ability to learn. ”， its 指代Dolphins，Dolphins为复数。所以此处应使用their。故将its 改为their。
“While scientists don’t know exact what they are talking about, ”， exact 修饰动词know ，所以此处应使用exact的副词形式。故将exact改为exactly。
10.“is thought that dolphins are telling each other that food is nearby, or warn each other of approaching danger.”，or前后连接的两个动词的形式要保持一致。warn 和telling形式应一致。故将warn改为warning。