28. There are many reasons (28) ________ it is important to have a hobby.
B. why
(The word "why" is used to explain reasons.)
29. First of all, a hobby can be a remedy for your (29) ________.
D. tiredness
(A hobby can alleviate "tiredness," making it an appropriate remedy.)
30. Because it is the activity you choose for yourself, it will always give you pleasure and (30) ________ you relax.
A. help
("Help" is used to indicate that a hobby assists in relaxation.)
31. Even if you just spend a little time enjoying your hobby, you can see the difference (31) ________ your spirit.
D. in
(The phrase "difference in your spirit" is the correct usage.)
32. Second, some hobbies can also (32) ________ you financially.
C. benefit
("Benefit" fits the context of providing financial gain.)
33. In (33) ________, a hobby can help you connect with other people.
D. addition
("In addition" is used to introduce another point.)
34. If you like collecting stamps, you can (34) ________ a stamp club to share your albums with other collectors.
C. join
("Join" is the appropriate word for becoming a member of a club.)
35. If your hobby is carving eggshells, you can give your products to your friends (35) ________ gifts.
D. as
("As" is used to indicate the purpose or role of the gifts.)