女性患者，67岁。右手抖动、行走缓慢己4年，经过神经科检查后考虑为帕金森病。
经药物治疗症状一度好转后又出现加重。为进一步治疗加用安坦、金刚烷胺、溴隐亭和苯海拉明，但近来症状突然波动交替出现加重和缓解两种状态，伴有异动症。此现象为哪种药物的副作用（）。
A.安坦
B.金刚烷胺
C.左旋多巴
D.溴隐亭
E.苯海拉明
参考答案：C
Which of the following is TRUE about the general manager and his assistants
A．He has more assistant working part-time than he had expected.
B．His assistants occasionally do more than the required amount of work.
C．His assistants get him to help them with their work from time to time.
D．He has so much work that he forgets to help his colleagues now and then.