删除：把多余的词用斜线（﹨）划掉。

增加：在缺词处加一个漏字符号（∧）, 并在其下面写出该加的词。

修改：在错的词下划一横线, 并在该词下面写出修改后的词。

①John Snow was interested in the second theory which was probably correct.

②It would be difficult to find a man to take place of the manager. 

③Dollywood has one of the best old wooden roller coaster in the world.

④That interested her most in London was the longitude line. 

⑤He announced with the certainty that polluted water carried the virus.

⑥John Snow thought about helping ordinary people exposing to cholera.

⑦The questions raised by the students is very important. 

⑧Every area of the park is modelled of life in the days of King Arthur.

⑨You must keep your eyes opened if you are going to make your trip enjoyable.

⑩Copernicus only published his theory as he laid dying.