IELTS(4）

pupil ---- teenagers  fourteen-year-old pupils  

asthma chronic obstructive (airway ) pulmonary disease 

obnoxious noxious venom 

passage 通道 tongue ruption 

substantial substance(s)

Calcium magnisium potassium contraction tract traction tissue 

fauna lull=relief

obligatery= compulsive (obligate obligation) 

mamia amino trustworthy 

resentful resent=aversion = be cold-shouldered incense  postilate herbicide persumably nocturnal 

amplitude prequency 

porous pit pore primordial