Camera của thiết bị bắn tốc độ ghi và tính được thời gian một ô tô chạy qua giữa

hai vạch mốc cách nhau 10 m là 0.56s. Nếu tốc độ giới hạn trên làn đường được quy

định là 60 km/h thì ô tô này vượt quá tốc độ cho phép không?

Một học sinh đi xe đạp từ nhà đến trường mất 20 phút. Đoạn đường từ nhà đến

trường dài 3km. Tính tốc độ của chuyển động ?

III. Write the correct form of the word in brackets.

1. People in the __________ areas are in need of direct assistance. (flood)

2. Ms Kim would like to make a _________ to the charity. (donate)

3. Have you ever given some money to the _________ ? (home)

4. Horse riding is _________ in my place because not many people do that. (usual)

5. Swimming is __________ for those who want to lose weight. (help)

6. I had mixed _________ about poor people in my community. (feel)

7. Penelope was absent from class yesterday because of her __________ . (sick)

8. His parents didn't agree to let his grandparents go into a _________ home. (nurse)

9. My father and I usually do _________ on weekends. (garden)

10. Do all __________ eat eggs and dairy products? (vegetarian)

X. Match the sentences.

My name is Cathy and I am eighteen years old. Last summer I went to Cambodia to do some volunteer work. I volunteered in an orphanage with about 100 children. I worked with the twenty-five babies and the younger children.

I loved working in the baby rooms of the orphanage. At first, it was really hard to see so many babies without a home. But after some time, I loved the babies like they were my own. I became especially attached to one of the babies. Her name was Sothy. She was three months old.

The younger children were adorable. They all just wanted our attention and love. I became extremely attached to a nine-year-old girl. The first day I met her, she seemed very sad, and didn't play with the other children. By the end of my time there she was laughing and smiling.

During my time at the orphanage I fed babies and played with them and loved every minute of the time I was there. All the children were so sad when I left but I do not think they were as sad as I was. This experience changed my life. It was a summer that I didn't waste.

- become attached to: trở nên gắn bó với

1. Cathy did some volunteer work in an orphanage last summer. __________ 

2. Cathy worked with about 25 babies and 100 children. __________ 

3. Cathy didn't love working in the baby rooms. __________ 

4. Cathy became attached to a three-month-old baby and a nine-year-old girl. __________

5. The younger children wanted Cathy's attention and love. ________

6. The nine-year-old girl smiled and laughed the first time she met Cathy. __________ 

7. Cathy enjoyed every moment she had in the orphanage. __________ 

8. Cathy wasn't as sad as the children when she left. __________ 

Giúp với nha!

V. Fill in each blank with a suitable preposition.

1. Will we pick __________ litter around our school this Sunday?

2. Our parents will help us whenever we are __________ need.

3. He was kind __________ sad and disappointed about his health.

4. We provided the street children __________ warm clothes.

5. This park is a popular place __________ residents in my neighbourhood.

6. They can enjoy water sports, or simply lie __________ the beach.

7. We've asked people to donate books and clothes __________ the children.

8. Could you please tell us __________ the community service?

9. Her collection has dolls from all __________ the world.

10. Eric wants to climb mountains __________ other countries.

C1. Phân biệt vật sống và vật ko sống?Cho ví  dụ về vật sống và vật ko sống?

C2. Trình bày các lĩnh vực của khoa học tự nhiên. Với mỗi lĩnh vực hãy nêu 2 ví dụ minh họa?

C3. Hãy nên những lợi ích của khoa học tự nhiên đối với con người và môi trường sống?

giúp mình với

Trình bày ý nghĩa của sự lớn lên và sinh sản tế bào.giải thích nếu cơ thể ko điều khiển dc sinh sản của tế bào thì điều gì sẽ xảy ra ( Em có bt sgk 72). Tính số tế bào con đc tạo ra từ 1 tế bào mẹ sau 5 lần phân chia

Giúp mình với nha