Sure! Here are the answers for each task:

### Task 1: Put the given conjunctions in brackets in their correct position.

31. Lan wanted to go to the cinema, **but** she was feeling boring.
32. It was very cold; we couldn’t swim, **therefore**.
33. I study hard, **for** I want to get good grades.
34. You should bring a compass; you will get lost, **otherwise**.

### Task 2: Rewrite the sentences so that they have the same meanings as the original ones.

33. A house can run 115km/hr while a lion can run 71km/hr.
- A horse can run **faster than** a lion.

34. I usually make crafts when I have free time.
- I enjoy **making crafts** when I have free time.

35. Jack finds doing the washing.
- Jack hates doing the washing.

36. Our father arrived home at 7.30 p.m. The rest of the family arrived home at 7.00 p.m.
- Our father arrived **later than** the rest of the family did.

### Task 3: Complete the half sentences.

37. I do morning exercise every day, **for** **it keeps me healthy.**
38. I love traditional food, **otherwise** **I wouldn't enjoy my culture.**
39. I am crazy about **music.**
40. My father is not keen on **watching movies.**

Feel free to adjust the examples in Task 3 according to your preferences!