七年级英语阅读题Do you chew gum after a meal?Chewing gum helps clean

七年级英语阅读题
Do you chew gum after a meal?Chewing gum helps clean your mouth.But some people spit chewing gum on the street _3_ putting it into the garbage box.It’s bad because chewing gum is sticky.It’s _4_ to get it off things.Recently a team of British scientists said they had solved the problem.They invented non-stick chewing gum.In Britain,150 million is spent to clean gum _3_ the country’s streets each year.It’s the same in China.On Beijing Tian’anmen Square,after the National Day Holiday,hundreds of thousands of chewing gum pieces are left on the ground.It usually _4_ weeks to clean them up.But the non-stick gum is easier to clean.It gets washed away by the rain or by street cleaners very _5_.Although you get the non-stick gum in your hair,you can wash it out with shampoo.”The gum is coated with a thin film of water,”said Prof Cosgrove,the leader of the study.“That’s _6_ it is not sticky at all.”
( )1.A.but B.instead C.instead of D.in order to
( )2.A.different B.hard C.easy D.important
( )3.A.out B.on C.from D.into
( )4.A.takes B.costs C.spends D.pays
( )5.A.easily B.quickly C.frequently D.carefully
( )6.A.how B.when C.which D.why