题目内容：

Scientists have developed a non-stick chewing gum(口香糖). The new gum can   1. (remove) easily from pavements, shoes and clothes. It’s the result of polymer (聚合体) research at the University of Bristol and could be launched commercially in 2008.   2.  it catches on(流行), the product will solve  3.  major headache for present authorities around the world.

“A great 4.  (disadvantage) of our Clean Gum is that it is easy to remove and has the potential to be 5. (environment) degradable (可降解的),” said Terence Cosgrove, a professor of chemistry  6.  helped to found a company called Revolymer to commercialize the technology.

Today’s chewing gums are made  7.synthetic latex(人工制造的乳液), which is resistant to the weather and is strongly sticky. The new gum adds a special polymer to change its properties(特性),    8.  (make) it far less sticky.

In two street trials,   9.  commercial gums remained stuck to the pavement   10.    Clean Gum came away naturally in all cases.