A. report
B. expert
C. soldier
D. science
E. flu
F. medicine
G. guide
His or her job is to look after other people during a trip.

A. It will make smokers feel good for a long time.
B. It will make it difficult for smokers to give up smoking.
C. It will do harm to smokers’ body and mind.

A. growing
B. grown
C. grew