A
If an old man suddenly falls down in front of you, will you help him? Most of us would choose to help him because we know it's the right thing to do. 1. others might refuse to do so. In my opinion, we should not only think about 2. (we).
I've had an experience like this before. I saw a woman 3. (walk) with a baby in her arms while it was raining heavily. Both of them 4. (be) wet because they didn't have an umbrella. I held out my umbrella for them 5. (quick). I walked several 6. (mile) with them till they got home. The woman thanked me 7. lot for what I did for her. At that moment, I had such a strong feeling of satisfaction. Offering help to people 8. trouble can make them feel really warm. And perhaps one day we'll become the one that 9. (need) help. So why don't we just reach out a helpful hand whenever we can? The more we trust and help each other, the 10. (good) our world will be.

1. But 2. ourselves 3. walking 4. were 5. quickly
6. miles 7. a 8. in 9. needs 10. better

B
My name is Jack and I am a middle school student. My best friend is Bob, and let me introduce him 1. you.
We have something in common. That's why we are best friends. We both enjoy 2. (study), so we always study together. He always wears a pair of glasses. In my mind, he is 3. (much) hard-working than any other classmate in our class. As a result, he always does 4. (good) in every subject. He helps me a lot in my study. However, I'm better at sports than him. I ask him 5. (run) with me every day after school. Sometimes it is really cold outside, 6. he never gives up. He tries his best to do sports to have a stronger body like me. We believe the best way to relax 7. (be) through exercise. When I feel sad, he is always there to listen. As his best friend, I should help 8. (he) too. It's not necessary to be 9. same, but the most important thing is to find a friend who truly cares about you.
A good friend is the sunshine in winter because it 10. (warm) my heart. I'm sure I've found a friend for life.

1. to 2. studying 3. more 4. well 5. to run 6. but
7. is 8. him 9. the 10. warms

Our science teacher thinks students can learn science through practice. “Today,” Mr Hersey said, “you’ll be divided into several couples. Each couple 1. (need) to invent an icebox! And there is no limit to 2. (method)!” Each couple would receive 3. piece of ice. The couple which had the biggest piece left the next day would win!
As 4. (usually), I worked with my classmate Vlad. We used two foam boxes, put the ice into the small box, and then put 5. (they) into the big box. Vlad also
6. (full) agreed. We produced the 7. (one) icebox, but the ice completely disappeared after one night. After much discussion, we tried again. This time we made the icebox 8. glass. Finally, we finished the second test better than the first time. 9. we repeated again and again to keep more ice existing.
We brought our 10. (invent) to the classroom. Nearly 60% of the ice still existed!

1. needs 2. methods 3. a 4. usual 5. them 6. fully
7. first 8. with 9. So 10. invention