27.
(A)
(B)
(C)

23. (A) He went to pick up his friend at the airport.(B) He went to a party and met his friends.(C) He went to a park to walk his dog.

24. (A) Her boss.(B) Her father.(C) Her professor.

25. (A) Buy tickets for the woman again.(B) Take a trip with the woman again.(C) Interview the woman again.

第四部分：短文聽解26. (A)(B)(C)

28. (A)(B)(C)

29.  (A) (B) (C)

30. (A)(B)(C)

1. A water-insoluble substance X has been shown to ameliorate the symptoms of Parkinson's disease in human, but its pharmacological mechanism has not yet clear. To investigate its mechanism in animals, the experimental group(s) should include animals that receive injection of (A) only substance X group (B) substance X and physiological saline groups (C) substance X and distilled water groups (D) substance X and the solvent that used for dissolve substance X groups.

2. The ion that is associated with exocytosis of synaptic vesicles after an action potential is (A) Na+ (B) Ca2+ (C) Cl- (D) K+

3. The synaptic potential (A) cannot be summated (B) is a long-distance transmission (C) occurs in the motor end plate (D) is also known as a pacemaker potential.