The first one, which has no subject at all, is actually wrong to say in what movie. We usually say, "A movie", so this sentence is changed to several movies with the theme of Nanjing Massacre, which restores many historical details and makes us deeply feel the courage of film creators to face human tragedies. The second is ambiguity. It says that there are more than 400 scientists in more than 20 countries, which can be understood as more than 400 scientists in more than 20 countries and more than 400 scientists in more than 20 countries. Therefore, this issue should be changed to the Eighth Laser Academic Conference held in Canada not long ago, which was attended by more than 400 scientists from 20 countries. These two papers were highly valued and praised. Third, if the collocation is improper, Wang Yu should assume the responsibility of presiding and should add a "post". Therefore, in addition to the work of the class and the student union, Wang Yu also assumed the responsibility of hosting the "Music Constantly" and "English Corner" columns of the school radio station. The fourth one is not feasible, although it should be put behind the masses, but this sentence should be changed to Australian Max who has painted colorful paintings on the doors of many toilets for decades, adding interest to people's lives. After his death, although the masses missed him, the art world did not list him as an artist. Fifth, it means long-cherished wish for many years, so I make mistakes repeatedly. Therefore, it was changed to Kofi Annan, Secretary-General of the United Nations, who left his post at the end of last year and settled in Geneva, where the European office of the United Nations is located, to spend his old age peacefully and realize his long-cherished wish. Sixth, a very simple mistake should be changed to Lin Ping, an ordinary employee of an insurance company. The story of her donating her liver to a girl who is not related by blood touched netizens, who spontaneously left messages on the Internet, and everyone enthusiastically called it "the pride of Ningbo". If your teacher and I say the same, adopt it, thank you!