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street50. Which of the following is NOT true in this passage? A. All things can be recycled forever.B. Some things can be recycled forever.C. Plastic, metals, cloth and paper can be recycled.D. Rubbish can also be used to make pletely new items.51. What does the underlined word “toss” in the passage mean? A. take out B. throw away C. give up D. find out52. The purpose of the passage is mainly . A. to introduce more recyclable materialsB. to let people know about how to recycleC. to warn people the importance of recyclingD. to suggest a new way to change and keep rubbishCIt’s mon to carry things on bikes, trains and even planes. But do you know small drones(無人機) can help carry packages to your home?For two years, Google has been working hard in their secret research lab. Their latest project is called Project Wing.Project Wing is Google’s invention of a drone delivery service. It is half plane and half helicopter and is slightly bigger than a seagull. It can deliver(投遞) packages to buyers by drone to door. The first drone test was made on a farm in Warwick, Australia. It sent sweets and dog treats to a farmer. The drone flew to the farm, hovered (盤旋), and dropped the package with a wire. Delivery is here!The best thing about drone delivery services is that delivery time will be greatly cut down. You’ll be able to order what you like online in the morning. And by noontime, the delivery drone will land your package.Throughout history, there have been different kinds of inventions that have helped people move things around, said Astro Teller, lead scientist of Google Wing, to CNN. Teller thinks Google drones will be the next big step.Interestingly, drones are not that young. The US has been using armed drones since 2002. But drones may also get another use. Film panies have asked to use drones to shoot videos from the sky.Yet Google’s delivery drones won’t be able to fly to buyers any time soon. However, Google has proved that drone delivery is possible. And with Amazon announcing their drone delivery service last year, the further research is going on to make delivery drones safe and suitable for buyers.53. What is Project Wing?A. Armed drones. B. Google’s invention. C. New apple APP. D. Wings to help people fly.54. What’s the usage of the drone in Project Wing according to the passage?A. Taking photos. B. Delivering goods. C. Ordering online. D. Hovering in the sky.55. What is the advantage of Project Wing?A. It can shoot videos in the sky. B. It is cheaper than other aircrafts.C. It has something to do with Amazon. D. The delivery time will be greatly cut down. 56. The following paragraph of this passage will discuss . A. drones can only be used in film making and army.B. delivery drones service will have a long way to go.C. Google and Amazon have achieved the drone delivery service at any time.D. people will continue the research on better drone delivery service for buyers.DMost animals have little connection with animals of a different kind, unless they hunt them for food. Sometimes, however, two kinds of animals e together in a partnership which does good to both of them. You may have noticed some birds sitting on the backs of sheep. This is not because they want a ride, but because they find easy food in the parasites(寄生蟲) on sheep. The sheep allow the birds to do so because they remove the cause of disfort. So although they c