1.B to thank -> to thank to

2.B excited ->exciting

3.c or -> and

4.c although -> because

5.c much -> more

6.b to buy -> buying

7.d they cook-> cooking

8.b talk-> have talk

9.b however -> but

10.b hardly->hard

11.c  when-> .... where

12.d look->looks

13.a better

14.a went->have gone

15.d wait until -> wait for

1. B → to thank to

2. B → exciting

3. C → and

4. C → because

5. C→ more

6. B → buying

7. D → cooking

8. B → have talk

9. B→ but

10. B→ hard

11. C → where

12. D → looks

14 A  → have gone

15. D → wait for