ALL OF THE ABOVE (if you want a good grade)
Answer:
working hard
Explanation:
Firefighters are constantly <u>working hard</u> in new fighting techniques.
The answer is A because Lucy challenged herself to talk to the boy, which turned out to have a positive result.
Him becoming the president of South Africa
It is Proofreading, it can't be revising because your not actually changing anything, your just looking for the errors.