Question

6. We went shopping yesterday and (to buy) a lot of things. 7. She (to be) to London a lot of times. 8. She (to be) in London last month. 9. I never (to taste) Indian food. 10. I (to taste) Indian food when we were at the restaurant. 11. They (not to write) to us since they moved to a new flat. 12. When they (to write) to you last? 13. How long you (to learn) English? 14. I (to learn) English long ago.

Answer 1

6) bought
7) was
8) was
9) have tasted
10) was tasting 
11) hadn't written
12) wrote
13) have been learning 
14) have been learning