单项选择题
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
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