How did I get to Mars? Everyone asks this. The journey wasn't easy. I had many challenges to face and an untold number of barriers in my way
As you can imagine, the amount of studying I had to do in college was enormous. If you stacked up all the textbooks I had to read, they
could probably reach the moon. I trained my mind the way a bodybuilder trains her muscles. This was the only way
to become an expert problem
solver, and that's just what an astronaut is.
_ I had to solve my biggest problem: my own self-doubt. When I was a child, no one ever told me I could be an astronaut. In fact,
many people told me quite the opposite. I had to convince myself to try. I told myself that each puzzle I solved, each project I finished, each book!
read, were tiny steps forward that would lead me to my final destination: setting foot on Mars.
Kalpana wants to revise her draft to emphasize the sequence of events.
Which phrase should she use in the blank to best express the sequence of events?