课时作业28
Ⅰ.阅读理解
(2017·海南省海口市第一中学月考)
Should every teenager be given a vaccine(疫苗)against the effects of nicotine, and so prevent them becoming addicted to cigarettes?
This controversial possibility seems likely to happen in the future, thanks to the development of a new vaccine for nicotine addiction. The vaccine was designed for people who want to quit smoking but who repeatedly relapse(复发)．But since most countries are failing to cut the number of children taking up smoking, many people will want to know whether the vaccine should be used far more widely if it proves to
