【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一下作文。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。
增加：在缺词处加一个漏字符号（^），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限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
Yesterday we went to Happiness Nursing House to help the old people. We set out earlier in the morning and brought them lots of gift. When we arrived, we were warmly welcome by them. First we introduced myself. Then we were making dumplings together with the old, talking and laugh. After lunch, we performed and sang songs with them happy. Finally all the old people say goodbye to us at the gate. We were very happy because of we did a good deed. I think this necessary for us teenagers to learn what to respect and take care of others, especially, the old.
在线课程【答案】
【解析】本文主要讲了作者去幸福养老院帮助老年人的经历，作者认为对于青少年来说，学习怎样尊重和照顾别人是非常有必要的。
考查副词。句意为早晨我们早早出发。修饰动词短语set out，用副词，所以earlier改成early。
考查名词单复数。被lots of修饰，所以用名词复数，gift改成gifts。
考查语态。“我们”和“欢迎”之间是被动关系，用被动语态，所以welcome改成 welcomed。
考查反身代词。首先我们介绍我们自己。表示“我们自己”，所以myself改成ourselves。
考查非谓语动词。laugh与其逻辑主语we之间是主动关系，所以用现在分词作伴随状语，laugh改成laughing。
考查副词。修饰动词sang，用副词，所以happy改成happily。
考查时态。表示发生在过去的事情，用一般过去时，所以say改成said。
考查固定用法。because后接句子，because of后面接成分，we did a good deed是句子，所以删除of。
考查形式主语。it necessary for us teenagers to learn what to respect and take care of others作think的宾语，所以it necessary for us teenagers to learn how to respect and take care of others是一个宾语从句，在宾语从句中，to learn how to respect and take care of others是真正的主语，前面需要一个形式主语，所以this改成it。
考查语义理解。我认为对于我们青少年来说，学习怎样尊重和照顾别人是非常有必要的。表示“怎样”，所以what改成how。