6. They were at the lecture yesterday.
Where were they yesterday?
7. He was at the university in the morning.
Where was he in the morning?
8. We shall go to Spain next week.
Where shall we go next week?
9. We exported food to Korea.
Where did we export food?
10. They will discuss possible prices tomorrow.
What will they discuss tomorrow?
9-й вопрос лучше поставить Where did we export food to? Ну и 8-й тоже Where shall we go next week to?