12. Where ______ (they, spend) last summer? - I ______ (not, know), I ______ (think) they ______ (be) in France.

Решение:

Вставляем глаголы в правильной форме Past Simple.

1. Where did they spend last summer?
2. - I did not know,
3. I thought
4. they were in France.

Ответ: did they spend, did not know, thought, were.