試題詳解

44. The passage tells us that the most probable reason for the death of the mice in Ader’s experiment was that _______.
(A) they had been weakened psychologically by the saccharin
(B) the sweetener was poisonous to them
(C) their immune systems had been altered by the mind
(D) they had taken too much sweetener during earlier conditioning
(E) the dysfunction of their digestive system