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