Question 18: D. when I started secondary school
("khi tôi bắt đầu học cấp 2" fits the context and time reference.)

Question 19: A. The club was formed fifteen years ago
(This sentence introduces a clear fact about the club's formation.)

Question 20: A. clean water
(Warm clothes and food are being provided, so "clean water" fits the category of essentials.)

Question 21: C. other unwanted items
(Refers to various items collected for donation.)

Question 22: A. Our club
(The paragraph is written from the perspective of a club member, so "Our club" is correct.)

Question 23: C. find my sense of purpose in life
(The text is personal, so "my sense of purpose" aligns with the first-person narration.)

Question 24: C. main
("Breakfast is the main important meal of the day" is the best fit.)

Question 25: C. unable
(Skipping breakfast leaves people feeling tired and "unable to concentrate" fits logically.)

Question 26: A. lose
(Eating in the morning helps people "lose weight" rather than gaining.)

Question 27: A. in
("Dividing the day’s calories in three meals" makes grammatical sense.)

Question 28: A. skipping
("Skipping breakfast" is the common issue described in the passage.)

Question 29: Folk music
(The passage explicitly states that pop music is influenced by folk music.)

Question 30: D. country people
(Folk music is traditionally composed and sung by country people.)