24. (A) The lack of overall urban planning. (B) The huge gap between the haves and havenots. (C) The inadequate supply of water and electricity. (D) The shortage of hitech personnel.

26. Questions 26 to 29 are based on the passage you have just heard. (A) She taught chemistry and microbiology courses in a college. (B) She gave lectures on how to become a public speaker. (C) She helped families move away from industrial polluters. (D) She engaged in field research on environmental pollution.