Question 36:
A. The phrase "It's possible" indicates uncertainty or a potential outcome. Therefore, "The exam result might be announced next week" captures the same meaning, expressing the possibility of the exam result being announced.

Question 37:
B. The phrase "kept getting worse" implies a continuous progression. "My headache was getting worse and worse" conveys the ongoing deterioration of the headache.

Question 38:
B. The conjunction "when" indicates a cause-and-effect relationship. "She left the classroom when she saw he was so angry" demonstrates that her decision to leave was prompted by witnessing his anger.

Question 39:
C. The question "How old do you think this beautiful city is?" asks about the age of the city. "When was this beautiful city built?" is a more direct way of inquiring about the city's construction, which aligns with the original question's intention.

Question 40:
D. The phrase "made it impossible" implies that the thick fog caused the inability for the plane to land. "The plane was unable to land because of the thick fog" accurately reflects this cause-and-effect relationship.

36. It's possible that sth + V = Sth might + V
37. Kept getting worse = Getting worse and worse: trở nên xấu đi và xấu đi.
38. QKĐ when QKĐ -> hai hành động liên tiếp trong quá khứ
39. how old: hỏi tuổi = when was S built?:
40. be unable to V