1 . 增加：在缺词处加一个漏字的符号（∧），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：每处错误及其修改均仅限一词。
1. The guides were naturally willing to go alone and seek a way out of difficulty, so we all went together.
2. You may depend on that it won’t happen again.
3. Concentrated your attention on English will enable you to master the language.
4. We have a lot in common, that is because we can cooperate.
5. The number of endangered species are on the increase.
6. Parents nowadays are aware about the importance of children’s education.
7. More and more material possession do not suggest that you gain more happiness.
8. It is such a honor to take part in the celebration, so how could I make any mistakes?
9. The mosquitoes annoyed me very much that I couldn't sleep.
10. The concert was constructed by your cousin last night was really a great success.

2 . 阅读并修改下列各句子，每句中只有一处错误，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。
1. One reason was because he painted very slowly, and sometimes did not finish his work.
2. These smart homes will provide a more comfortable environment to live.
3. He discovered that in two particular streets the cholera outbreak was very severe that more than 500 people died in ten days.
4. I bought some books, five of them were English novels.
5. When you reach the other end of the bridge, I will be waited right there to show you the way.
6. Accompany by six strong bodyguards, the president appeared.
7. There is a growing tend to regard quality of life more highly than money.
8. I had to admit that it was entire my fault.
9. Of the two possible plans I am in the favor of the former one.
10. Be with friends and family plays a big part in experiencing happiness.

3 . 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.