подскажите правильный ответы в предложения
1.Pharmacodynamics causes the ….drug effect on the body
a)usual
b)curable
c)desired
d)written
2.Side effects can be ….and they can occur immediately or months later.
a)insignificant
b)significant
c)normal
d)extensive
3.….of drugs is one of the most important activities.
a)usage
b)annotation
c)administration
d)prescription