試題詳解

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.