题目内容：

下列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.Select a mobile phone for personal use is no easy task because technology is changing so rapidly．

2.There is some doubt among doctors that the medicine will have an effect on the patients．

3.The famous musician as well as his students who were also excellent singers were invited to perform at the opening ceremony of the Taipei Flower Expo．

4.There are some health problems that， if not treating in time， can become bigger ones later on．

5.﹣﹣﹣ Now Nanjin g is so beautiful that I couldn't recognize it when I came back．

﹣﹣﹣ Yes． Great changes have been taken place in the past ten years．

6.The man who in charge of the factory is helpful and generous with money．

7.Only when I left my parents for Italy I realize how much I loved them．

8.Tsinghua University， found in 1911， is home to a great number of outstanding figures．

9.Scientists have advanced many theories about why human beings cry tears， but none of which has been proved．

10.At the eighteenth birthday party Peter received a pencil box being decorated with some cartoon pictures on the top．