1. Nam: The United States ______ a very large country. - Lan: Yes, it is in North America.

2. Nam: Many mountains ______ covered in snow. - Lan: They look beautiful in winter.

3. Nam: Much soil ______ been washed away by the rain. - Lan: That's bad for the plants.

4. Nam: Either Tom or his brothers ______ the map. - Lan: You should ask them.

5. Nam: Either his brothers or Tom ______ the map. - Lan: You should ask him.

6. Nam: Somebody ______ left their umbrella here. - Lan: I will put it in the lost office.

7. Nam: The rich ______ not always have easy lives. - Lan: I agree, everyone has problems.

8. Nam: A group of students ______ waiting for the bus. - Lan: The bus is coming now.

9. Nam: Eating cakes ______ you feel happy. - Lan: But don't eat too many!

10. Nam: News about the storm ______ very worrying. - Lan: Let's stay inside.

11. Nam: Maths ______ the most difficult subject for me. - Lan: I think it's fun.

12. Nam: Each student ______ to wear a uniform. - Lan: Yes, it's the school rule.

13. Nam: Mary together with her sisters ______ going to the cinema. - Lan: Can I go too?

14. Nam: We as well as she ______ tired of this work. - Lan: Let's take a break.

15. Nam: Neither Tom nor his brothers ______ at the party last night. - Lan: I didn't see them either.

16. Nam: Neither his brothers nor Tom ______ at the party last night. - Lan: I didn't see him there.

17. Nam: Not only Tom but his sisters ______ English very well. - Lan: They study every day.

18. Nam: The number of students in this class ______ forty. - Lan: It's quite big.

19. Nam: A large number of students ______ failed the test. - Lan: That's a pity.

20. Nam: Tom with his parents ______ at the restaurant. - Lan: They are having dinner.

21. Nam: Students with their teacher ______ visiting the farm. - Lan: They are learning about animals.

22. Nam: Several flowers ______ in the vase. - Lan: They look very fresh.

23. Nam: Traffic in this city ______ very busy today. - Lan: Yes, it's a holiday.

24. Nam: The furniture in his room ______ very expensive. - Lan: He has a lot of money.

25. Nam: Everyone ______ to be happy. - Lan: Yes, that's true.