【题目】The medicine takes effect in the __________ stage of treatment, but the effect declines when it is taken for several months.
A. potential B. instant
C. original D. initial
在线课程【答案】D
【解析】
考查形容词词义辨析。句意：药物在治疗初期起作用，但其效果在几个月后就会下降。A. potential潜在的；B. instant立即的；C. original原始的；D. initial开始的。故选D。