Here are the completed sentences:

1. Our plane (take) **takes off** at half past nine tomorrow morning.
2. My sister promises that she (teach) **will teach** me how to play chess tomorrow.
3. I think I (buy) **will buy** a new pair of badminton rackets next Sunday because mine is broken.
4. How often you (go) **do you go** mountain climbing?
5. My grandmother (not-like) **does not like** spicy food.
6. John (learn) **is going** to learn to carve eggshells this summer because he really likes this kind of art.
7. (you join) **Are you joining** our guitar club this weekend?
8. Martin (play) **plays** football every Tuesday afternoon in the park near his house.
9. David (give) **is giving** his younger sister a book as a birthday gift next week.
10. My mother always (collect) **collects** rags for me to make clothes for my dolls.
11. My parents don’t like (eat) **to eat** out because they think it is not healthy.
12. I hate (play) **playing** cards with my elder brother because he always cheats.
13. Martin enjoys (go) **going** to the church at weekends.
14. My daughter loves (read) **reading** comics before going to bed.