The word 'helping' <u>is a verb</u> since it's a doing word. A verb must be a doing word e.g. running, jogging, walking and cycling.
Speak about how the world has evolved through the topics of science and technology (separately)
Discuss the fact that 40 years ago computers weren't invented and now they are beyond the capacity of a human brain.
Discuss how science nowadays has been able to uncover mysteries of the earth as well as how science has created (in cooperation with technology) robots.
Basically discuss how it has changed over the years, the importance of technology in the changing world as well as science.
The list of cities rome and sparta conquered
The third sentence:
Ming and her sister, who is home from college for spring break, organized a bake sale to benefit the victims of the fire.