While the efforts are certainly not futile, the results of such bans will likely only start to be seen by generations down the line, bettering the world for the future. (CET6-2017.12)

Question 1 A: Offering services to help people stop smoking. B: Raising taxes. C: Warning people about the dangers of tobacco. D: Enforcing bans on tobacco advertising.

According to the passage, why some scientists are thinking twice about doing or reporting their research A: Because they are lack of fund. B: Because they have to share the honor with others. C: Because their research may arouse Controversy. D: Because the government bans them from publishing the results of their research.

Which statements about the use of plastic bags are ture? A: Initiating a law which strictly bans the use of it. B: Supermarkets or shopping malls should provide the bags for free or with a minimum charge. C: Reducing to produce plastic bags those made from non-degradable materials. D: Encourag ordinary shoppers to reuse the bags by giving them discount.

Few airlines want to impose a total ban on their passengers using electronic devices because______. A: they don't believe there is such a danger as radio interference B: the harmful effect of electromagnetic interference is yet to be proved C: most passengers refuse to take a plane which bans the use of radio and cassette players D: they have other effective safety measures to fall back on