1 . 每句中有一处错误，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. Old as the man was, but he was always willing to help others.
2. I don’t know how to find the key being lost in the bathroom.
3. He was about to open the door while the telephone rang.
4. The facts suggested that he be ill so we advised him to go home.
5. Many scientists were puzzled about what they discovered in universe.
6. General speaking, speaking English is easy to understand and master.
7. It surprised us most was that he failed to appear in a meeting.
8. The young couple like to have their house painting white.
9. Two days ago, I have visited an old friend on the way home.
10. The knife used to cut meat so it sells well in the shop.