The key answer of exercise 9

a)

1. despite
2. While
3. Although
4. However

b)

1. a comma
2. an-ing form (e.g. despite knowing)
3. The main clauses are: sentence 1 - Celebrities invite publicity ...; sentence 2 - ... others never want or plan for it.; sentence 3 - ... often they are more interested in selling a sensational story.
4. the subordinate clause

c)

1. Some celebrities are good role models for young people. However, others set a negative example. / Although some celebrities are good role models for young people, others set a negative example.
2. Despite the fact that anonymously published internet news is unreliable, many people rely on it as a main source of information. / Despite anonymously published internet news being unreliable, ... / Despite the unreliability of anonymously published internet news, ... / While anonymously published internet news is unreliable, many people rely on it as a main source of information.
3. While false reports of celebrity deaths are common, some people still believe them. / False reports of celebrity deaths are common. However, some people still believe them.
4. Although the scandal damaged his reputation, he still has millions of fans. / Despite the scandal damaging his reputation, he still has millions of fans. / Despite the fact that the scandal damaged his reputation, ... / Despite the damage that the scandal did to his reputation, ...