Here are the answers to your multiple-choice questions as well as the rewritten sentences based on the prompts provided:

### Multiple Choice Questions:
13. I'm very proud **B: of** you.
14. I **B: Did** my English exercise before. I went out.
15. How much time do you spend **A: on** leisure activities?
16. **C: what a** terrible weather.
17. Janet and I live quite far **A: from** each other.
18. Is it Eiffel taller **B: than** Big Ben?

### Writing Prompts:
33. She passed the exam. She was lazy (though).
→ She passed the exam, though she was lazy.

34. Nam was watching TV. She came (when).
→ Nam was watching TV when she came.

35. This question is very difficult, so we cannot do it (because).
→ We cannot do this question because it is very difficult.

36. They are interested in playing games (love).
→ They love playing games.

37. She will help you. You have much time (if).
→ She will help you if you have much time.

38. They get up early. They feel well (they more).
→ They feel better the more they get up early.

39. She likes learning English (in).
→ She is interested in learning English.

40. They were cooking dinner. Their mother was cleaning the floor (while).
→ While they were cooking dinner, their mother was cleaning the floor.

If you have any more questions or need further assistance, feel free to ask!