43. What is tiie role of photosensitizers in lhe study?
(A) Manu&cturing antibiotic medicines
(B) Producing toxic reactive oxygen species
(C) Heating and breaking the outer layer of bacteria
(D) Strengtfiening individuals' defense systems
(E) Absorbing and distributing light

39. What is the main concern addressed in the recent study mentioned in the news? (A) The environmental pollution caused by nanoplastics (B) The number of nanoplastics in bottled water (C) The number of plastic bottles in the environment (D) The synthetic chemicals in the digestive tract (E) The excessive packaging of plastic bottles

40. Why is "human hair*' mentioned in this article? (A) to illustrate the size of nanoplastics (B) to demonstrate the number of nanoplastics (C) to emphasize the harms to the body (D) to show the diverse shapes of nanoplastics (E) to show where nanoplastics may go to

41. What does the temperature of the body do to those nanoplastics? (A) It fecilitates the release of tiiese chemicals from the plastics. (B) It enhances the visibility of nanoplastics undraer a microscope. (C) It inhibits the mL ration of chemicals fix)m p lastics. (D) It accelerates lhe degradation of nanoplastics. (E) It increases the circulation of plastic particles in the bloodstream.

42. What is the primary focus of the study mentioned in tiie news? (A) Developing new antibiotics (B) Using the light in antibiotic treatment (C) Investigating bacterial defenses (D) Identifying drug-resistant strains of bacteria (E) Testing the efiects of turmeric on bacteria

44. What is tiie benefit of using photosensitizers in anti-bacterial treatments? (A) cheaper prices of antibiotics (B) lower pains of patients (C) decreased side effects (D) lower doses of antibiotics (E)easier accessibility of mediations

45. What is the limitation of tiiis current attempt? (A) Increased strains of super virus with resistance to antibiotics (B) Efficacy on limited trains such as Staphylococcus aureus (C) Recurring resistance after a few bacterial growth cycles (D) A short supply in novel treatments (E) Vira] and *mgal resistance to antibiotics

46. Based on the context, what is the closest meaning of "arsenal" in the last sentence? (A) Increased doses of antibiotics (B) Bacteria, virus, and fungi (C) More radical treatments (D) An innovative research team (E) A diverse range of treatments

47. Which is a 'textbook" symptom of a person having a heart attack, as mentioned in the news? (A) heat exhaustion (B) feeling tired (C) vomiting (D) discomfort throughout the body (E) clutehing arms

48. What is primary concern when women present dififerent heart attack symptoms? (A) Prolonged recovery (B) Misdiagnosis and delays (C) Slower response to medication (D) Low textbook sales (E) Gender exploitations

49. Why did many researchers choose to study only male rodents in laboratories? (A) They think female rodents are not representative of the group. (B) They fbund female rodents are more likely to be resistant to treatments. (C) Male rodents display more observable symptoms. (D) The、think 伐male rodents' hormones make data inconsistent. (E) This has been historically true and people stop questioning it.