If you tend to regularly suffer from a certain symptom like headache, be sure to keep in store the
medicine to take care of the issue as soon as it starts.
A. efficient
B. concise
C. appropriate
D. secure
网友回答
A. efficient
B. concise
(答案→)C. appropriate
D. secure
解析：形容词辨析。A高效的；B简洁的；C恰当的；D安全的；句意：如果你患上头疼这样的症状的病的时候，你要储备好一些恰当的药。根据句意说明C正确。