C. Choose the correct item and explain. 21. The Smiths moves / moved to the USA last week. 22. These days he lives / lived in a cottage in the country. 23. They work / worked in a factory in 1970. 24. The town is / was a busy place today. 25. We often visit / visited the beach when we were young. 26. She opens / opened the box and took out her present. 27. He comes / came back late yesterday. 28. I meet / met with my friends at weekends. 29. Nowadays a lot of people travel/travelled around the world.

Ответ:

1. The Smiths moved to the USA last week. (Past Simple, так как есть указание на время в прошлом: last week).
2. These days he lives in a cottage in the country. (Present Simple, так как действие происходит в настоящем времени).
3. They worked in a factory in 1970. (Past Simple, так как есть указание на время в прошлом: in 1970).
4. The town is a busy place today. (Present Simple, так как действие происходит в настоящем времени).
5. We often visit the beach when we were young. (Past Simple, так как действие относится к прошлому: when we were young).
6. She opened the box and took out her present. (Past Simple, так как действие произошло в прошлом).
7. He came back late yesterday. (Past Simple, так как есть указание на время в прошлом: yesterday).
8. I meet with my friends at weekends. (Present Simple, так как действие повторяется регулярно).
9. Nowadays a lot of people travel around the world. (Present Simple, так как действие происходит в настоящем времени).

Ответ: