45 What does “the latter” refer to in the passage?
(A) The people with real gum.
(B) The people with imaginary gum.
(C) The people without gum.
(D) The people in the experiment.

41 According to the passage, what might have disturbed the Loch Ness Monster? (A) The noise from the construction work. (B) The growing population around the lake. (C) The environmental pollution in Loch Ness. (D) The constant scientific research in the area.

42 When did the story of the Loch Ness Monster first receive a lot of public attention? (A) In A.D. 565. (B) In the 1930s. (C) In the 1960s. (D) In the mid-1970s.

43 What is the best title for this passage? (A) New Experiments on Chewing Gum. (B) The Key to Staying Awake. (C) Chewing Gum for Better Memory. (D) The Popularity of Chewing Gum.

44 Which of the following is NOT mentioned in the passage as a possible reason why people chew gum? (A) To stay awake. (B) To be in good shape. (C) To have good breath. (D) To fight tooth decay.

46 According to the passage, which of the following statements is true about the experiment? (A) In the experiment, the three groups were asked to measure their heartbeats. (B) In the experiment, only twenty-five people were given real gum to chew on. (C) The people with imaginary gum did fastest on the memory questions. (D) There was more activity in the brain for those who didn’t chew anything.

47 (A) ironic (B) hectic (C) exotic (D) drastic

48 (A) left out (B) fed up (C) worn down (D) put off

49 (A) greed (B) jealousy (C) revenge (D) bliss

50 (A) rivalry (B) outbreak (C) boundary (D) discharge

1 AI technologies can provide highly precise insights into market trends, which allow companies to stay ahead of____and well prepare for a dynamic market. (A) competitors (B) participants (C) collectors (D) programmers