1 . In high school, I did a scientific experiment. The experiment made me _______ that science could teach us a lot. It teaches us the _______ so we know where we are from. That day, I firmly _______ to be a scientist. Ever since that day, I have studied harder _______ in all my science-related subjects. After school, I do much research on how I can become a _______ scientist in the future.

One of my _______ in becoming a scientist is Barbara McClintock, who was awarded the 1983 Nobel Prize in Physiology or Medicine. At 25, she already had her PhD in botany. After that, she started her _______ as the leader in the development of maize cytogenetics (玉米细胞遗传学) and she _______ herself to that research for the rest of her life.

If I am lucky and given the _______ to achieve my ambition as a scientist, I want to be like Doctor McClintock. She ________ something that helped the other scientists ________ the things about genetics (遗传学).

I know I will be able to achieve my ________ as long as I put my heart and perseverance into it. If I achieve my goal, I will share my ________ of success with all the kids who also love science and want to become scientists. My future will be as ________ as the stars in the night sky. However, my future is still far. I will make the most of the ________ to achieve my greatest ambition of becoming a scientist.

2 . Winter plunged Eastern Canada into a deep freeze. We sat at home, waiting for the COVID-19 cases to decrease and for the weather to _________. We all dreamed of what we would do when we could _________ go outside.

Each of us looked forward to something to keep us _________ the isolation: seeing friends, eating in restaurants, watching a movie at a cinema… My hope has quietly been gathering _________ in the garage since November. She is getting old, with more replacement parts than originals. But with all bike stores being low on new models, she is all I have.

On my bike, I’m _________, free from gas tanks or batteries; as long as I’m _________ and eating, I can _________ to the ends of Earth if I want. No obstacle is impassable. _________ roads mean nothing: there is a(n) _________ to weave between cars in traffic. This __________ of freedom means even more to me with the experience of lockdown.

Every few years I __________ a new ache or pain. I am starting to get __________. I can’t cycle as fast as I used to. But every time I encounter a hill, I don’t give up. I never want to __________ this sense of freedom. I’m waiting for that first warm day when the pandemic walls __________. I want to put on my __________ and for one brief, beautiful moment, be free again.

3 . I have a dream. One day I will be able to pursue my studies outside home country and be able to contribute ________ to the development of the world. My dream ________ was the United States. It is because I had the desire to learn more about American culture and ________ At the same time I admired their hi-tech technology.

It was my summer visit to the Boston University that made me have a true “away from home” feeling and the desire to ________ my engineering degree from the university. The university motto — Learning, Virtue, Piety — ________ me to the campus. It made me feel that I was at the ________ place at the right time to ________ my dream. I hope that by the time I ________ my course, I will not only graduate with top-class ________ in engineering but I will also have grown up both socially and ________ I had a chance to visit the ________ of engineering. After having a ________ discussion with the head of department, I concluded that Boston University has the ________ engineering programme as ________ to other universities that I had visited. Because all their programmes are ________ to meet and address students' ________ needs.

We live in a “digital village” which is ________ by the Internet, science and technology and I am given a chance to pursue my engineering degree at the university. I hope to contribute positively to the ________ and development of the economy of my home country as well as that of the developing nations around the world. I ________ hope that my application will ________ and I will live to fulfill my dream.

4 . I live near an abandoned (废弃的）house in New Orleans. I always thought about how I could make it a nicer space for my neighborhood.

In 2009, I ______ someone I loved very much. She was a mother to me. Her death was sudden and unexpected. And I thought about ______ a lot, which really made me ______ for the time I’ve had, and brought clarity (清晰）to what are meaningful to my ______ now. But I ______ to maintain this perspective (视角）in my daily life. I feel like it’s easy to get caught up in the day-to-day, and forget what really ______ to me as we grow and change.

With help from old and new friends, I ______ the side of this abandoned house into a giant ______ with a fill-in-the-blank sentence:   “Before I die, I want to ...”Anyone walking by can pick up a piece of chalk, ______ their life, and share their personal ______ in public space.

I didn’t know what to expect from this experiment, but by the next day, the ______ was entirely filled out, and it kept growing. This abandoned space became a ______ one, and people’s hopes and dreams made me ______ out loud, tear up, and they comforted me during my tough times. Later, I started receiving hundreds of ______ from passionate people who wanted to make a wall with their community. So my friends and I helped make walls in countries around the world.

______, we’ve shown how powerful our public spaces can be if we're given the opportunity to have a voice and share more with one another.