I.                Fill in the blank with a suitable word Man probably could not live without the help of animals. The role of animals in the balance of nature ranks as their (1)…………………… important service to man. Animals also serve man by (2) …………………...him with many foods and other useful products. Without animals, man would (3) …………………... no meat, milk, eggs, or honey, or wool, fur, or silk. For thousands of years, man has caused changes in the animal kingdom. He has tamed many kinds of animals and used (4) …………………... for food and clothing. He has killed or driven away animals that once attacked or interfered with his use of land. Today, he tries to protect many kinds of animals that are (5)…………………… danger of dying. Like man, most plants depend (6) …………………...animals for many of their basic needs. Without animals, many (7). …………………...could not easily reproduce. For example, many plants with flowers depend on bees and other insects to carry their pollen (8)…………………… plant to plant. Many oak trees from acorns that squirrels bury and then forget, or from .acorns that deer step on and push down into the soil. Birds often (9)…………………… from one place to another with seeds slinging to (10) …………………...feet.

Để hoàn thành câu đề bài, bạn cần điền từ thích hợp vào chỗ trống để hoàn thành câu. Dưới đây là cách hoàn thành câu của tôi:

1. vital
2. providing
3. have
4. them
5. in
6. on
7. plants
8. from
9. migrate
10. their

Câu trả lời cho câu hỏi trên là:
"Man probably could not live without the help of animals. The role of animals in the balance of nature ranks as their vital important service to man. Animals also serve man by providing him with many foods and other useful products. Without animals, man would have no meat, milk, eggs, or honey, or wool, fur, or silk. For thousands of years, man has caused changes in the animal kingdom. He has tamed many kinds of animals and used them for food and clothing. He has killed or driven away animals that once attacked or interfered with his use of land. Today, he tries to protect many kinds of animals that are in danger of dying. Like man, most plants depend on animals for many of their basic needs. Without animals, many plants could not easily reproduce. For example, many plants with flowers depend on bees and other insects to carry their pollen from plant to plant. Many oak trees grow from acorns that squirrels bury and then forget, or from acorns that deer step on and push down into the soil. Birds often migrate from one place to another with seeds clinging to their feet."

4. Over time, humans have tamed and utilized different types of animals for food and clothing purposes, while also taking steps to protect endangered species.

3. Without animals, humans would not have access to essential items such as meat, milk, eggs, honey, wool, fur, or silk.

2. Animals also provide humans with various foods and useful products.

1. Animals play an extremely important role in providing services to humans in maintaining the balance of nature.