Bài 1:Complete the sentences with either is/are or has/have.If both singular and plural forms are possible, write them both. 1.A number of shoppers..........complained about the price increase. 2.I can assure you that everything.......perfectly safe. 3.Either of the dentists.......available. Which one do you want to see? 4.The majority of primary school teachers.....women. 5.Each of Susan's colleagues.......sent her a personal letter of support. 6.Although some people find cricket boring, each match.......different. 7.We've got two cars, but neither of them.......particularly new. 8.All of the office staff.......agreed to work late tonight to get the job finished. 9.A lot of the pollution.......caused by the paper factory on the edge of town. 10.None of the TV programmes......worth watching tonight. 11.Reasearchers have reported that neither of the so-called "environmentally friendly" fuels.......less damaging than petrol and diesel. 12.I hope everyone.....a good holiday.See you next term. 13.The number of pupils in school with reading difficulties.....fallen this year. 14.Some people.......the strangest hobbies.My brother collects bottles. 15.None of the information.......particularly useful to me.

Để hoàn thành các câu, chúng ta cần xác định xem số lượng những người/thứ cụ thể mà chúng ta đề cập đến là đếm được hay không. Nếu đếm được, chúng ta sử dụng dạng số ít của động từ (is/has), nếu không đếm được, chúng ta sử dụng dạng số nhiều của động từ (are/have).
1. A number of shoppers **have** complained about the price increase.
2. I can assure you that everything **is** perfectly safe.
3. Either of the dentists **is** available. Which one do you want to see?
4. The majority of primary school teachers **are** women.
5. Each of Susan's colleagues **has** sent her a personal letter of support.
6. Although some people find cricket boring, each match **is** different.
7. We've got two cars, but neither of them **is/are** particularly new.
8. All of the office staff **have** agreed to work late tonight to get the job finished.
9. A lot of the pollution **is** caused by the paper factory on the edge of town.
10. None of the TV programmes **are** worth watching tonight.
11. Researchers have reported that neither of the so-called "environmentally friendly" fuels **is/are** less damaging than petrol and diesel.
12. I hope everyone **has** a good holiday. See you next term.
13. The number of pupils in school with reading difficulties **has** fallen this year.
14. Some people **have** the strangest hobbies. My brother collects bottles.
15. None of the information **is** particularly useful to me.

5. Each of Susan's colleagues has/have sent her a personal letter of support.

4. The majority of primary school teachers are women.

3. Either of the dentists is available. Which one do you want to see?

2. I can assure you that everything is perfectly safe.