Careers in science are generally believed to be too complex for students who aren’t talented or clever enough, but Seott Kelly, commander of the International Space Station, would prove it’s ______.

As a kid, he was abstracted and uninterested in science and all other ______ as well. He couldn’t ______ what the teachers were saying, spending most of his time in school daydreaming.Therefore, he earned terrible grades and barely graduated from high school, and he even thought he would never ______ his dreams.

That all ______ when he picked up and read The Right Stuff, Tom Wolfe’s classic account of the pioneering Americans who first explored space. ______ at last, he was determined to be an astronaut, which meant doing well in science classes. So that day, he ______ his mind to do well in it.

After so many years of daydreaming, it wouldn’t be ______ . But he started thinking about it like a game. The more he ______ his study skills, the more he gained and the better he got. ______ , it became a(n) ______ with himself to see how good he could get. No one was more surprised than him when a ______ daydreamer started getting straight A’s in science, which is essential to be an astronaut.

So we need to stop ______ the statement that science is just too hard. If you’ re students who have been told “you are not a science people” or “your brain doesn’t think that way”, just ______ the comments! Everyone who wants to can learn this stuff — they just have to be ______ to do the work.

Cold and windy, it wasn't like the first day of spring. The COVID-19 pandemic(流行病) was spreading around the world, and there were feelings of _______ and loneliness everywhere. Here the schools had been closed, restaurants _______ and people had been told to work _______ home whenever they could. Even the sheltered workshop(车间) where my son worked had been closed until further _______. People had made a run on the stores and large areas of the shelves were _______. On the news, the number of the sick and dead continued to rise _______. It felt like there was a _______ on everyone in the world.

My own family was _______ at home as much as possible. One day, looking out of my window, I wondered how long the crisis (危机) would last. It was then, _______, that I saw something that lifted that weight off my mind and made my face ________ again. On the street below my ________, there was an old friend of mine who was a teacher. He and a tall man were __________ door to door school lunches for the __________ children who were stuck at home. Watching them, I thought of our childhood neighbor Mr. Roger' s words “In the bad times, always look for the ________.”

I have no doubt that this crisis will __________, as all the crises before. But it is our ________ on whether it brings out the best or the worst in us. Let it bring out__________ in you. Use it to __________ your faith. Use it to free __________ from fear. Use it to grow kinder, more __________ and more loving. Become a helper to all those in need, and you will be doing angels' work today and in all the days to come.

The first week is always a bit hard in my writing classes. I’m unfamiliar ________ the students, most of them trying to ________ themselves to their new environment. When Jennifer ________me with a question on the second day, I was ________ for the chance to connect at least one name with a face.

Her writing wasn’t perfect, but her effort was. She worked hard and pushed herself to achieve. She was excited to learn,________ made me enjoy teaching her. I didn’t realize then how much she would also teach me.

One Friday afternoon, Jennifer stopped by after class. She wasn’t asking a question about a paper I’d returned.________, she said quietly: “I didn’t attend classes yesterday. I was at the health center the whole day.” I gave her a sideways look,________. “It was just a virus (病毒). I’m fine now,” she ________ me. Then she was gone.

Two nights later, her father called to tell me that Jennifer would be missing a few classes. She had been in hospital with meningitis (脑膜炎). I heard from him again a few days later, and again after that. Her condition grew ________. We made trips to the hospital room. I was ________ frightened when I saw the pale, thin and weak girl who, only ten days earlier, had displayed life and warmth in my classroom.

A week later, Jennifer herself called me to tell me she was on the road to ________. “I’ll be back to school one day,” she said. “I have no ________ that you’ll be with us.” I told her,________ tears. I remembered what her father had said in his first phone call: “school ________ everything to Jenny.”

Then five weeks later, I walked into my classroom to find Jenny in her seat, smiling. She ________all of her missed homework, completed with thought and excellence. The strength of her will to overcome shone out of her pale, weak, eighteen-year-old face.