1 . 下列各句中都有一处错误，错误涉及一个单词的增加、删除或修改，请按要求修改下列各句。错误改在原句上。
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（\）画掉。
修改：在错的词下画一横线，并在该词下面写出修改后的词。
1. To my surprised, the door of the library was locked when I got there.
2. We spent two hours sing songs in the karaoke bar yesterday.
3. If it rains tomorrow, I stay at home to do my homework.
4. We don’t have too many homework to do today.
5. He liked the book so very much that he wanted to buy one immediately.