16. According to the article, what aspect of e-cigarette use is especially attractive to young people?

a)They make smoking look healthy.
b) they are inexpensive to buy.
c) they contain only water vapor.
d) they come in appetizing flavors.


17. What does Dr. Fernandez imply with the phrase “la puerta de entrada” ?
a) Smoking e-cigarettes is the gateway to popularity and acceptance for adolecents.
b) Smoking e-cigarettes is the beginning step in the path towards smoking cigarettes.
c)Smoking e-cigarettes is viewed by teenagers as harmless.


B- Short answers based on the article:

18. What effect does the use of these e-cigarettes have on the fight against smoking cigarettes?



19. How does the doctor conclude the article?