64. What is the main theme of this passage?
(A) Keeping pets at home is a way to cure children’s allergies.
(B) Pets could be the main source of household allergens.
(C) Living with pets may protect young children from allergies.
(D) Parents should get rid of pets to prevent children’s allergies.

60. (A) extant (B) extent (C) extenuation (D) extension

61. (A) for (B) by (C) to (D) in

62. (A) in interest (B) of interest (C) interested (D) interested in

63. (A) engages in (B) engages (C) is engaged with (D) is engaged to

65. Why is the research important? (A) It conducts longitudinal follow-ups on children until they were 18. (B) It identifies pet-related bacteria from household pets that cause asthma. (C) It confirms that exposures to pets strengthen children’s immune system. (D) It concludes that dust, not pets, provokes allergies in the infancy.

66. Which of the following argument is suggested in the research? (A) Teenagers owning cats or dogs are less likely to develop allergies to those animals later in life. (B) A child who has been living with pets anytime after one year old has a significant lower risk of having allergies. (C) There is a certain period of time in which exposure to pets may have a protective effect against allergies. (D) Sending away pets is an effective way to prevent children’s allergies.

67. What of the following is closest in meaning to the word “mystified” (in line 7)? (A) upset (B) bewildered (C) satisfied (D) bestowed

68. Where can the following sentence be inserted into the passage? It’s possible that factors other than having a dog or cat in the house influenced the study participants’ risk of allergy. (A) [i] (B) [ii] (C) [iii] (D) [iv]

69. According to the passage, which of the following factors MOST influences where life is found on Earth? (A) Climatic conditions. (B) The length of days and nights. (C) Ocean tides. (D) Geographic boundaries.

70. According to the passage, plants on the tundra grow close to the ground (A) to avoid being eaten by arctic animals. (B) because fertilizer is not readily available. (C) to minimize exposure to the cold. (D) because unfrozen water supplies are very scarce.