1 . 每句中只有一处；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的词。
1. Tu Youyou first went to Hainan, which malaria was more common, to study malaria patients.
2. Only a few journalists dared cover the story.
3. It was at the railway station where I met Li Ming yesterday.
4. When he was 16, he tried to enter into university in Switzerland, but failed.
5. Although Henry was curious about it, he had to postpone open the letter until 2 o'clock.