In Hebei， there is a small village called Yeli． Through the village，you can see green trees along the riverbank． However， you can hardly imagine that， about 16 years ago， this area was covered with rocks and weeds（杂草）． The big change is all because of years of hard work by two best friends： Jia Haixia， who is blind， and Jia Wenqi， who has no arms．

    The two friends decided to plant trees to make a living back in 2002． Although both are disabled， they learned to work together by becoming each other's eyes and hands． With little money to buy young trees， they had to collect and plant cuttings（插枝，插条）． Every morning， they went to the riverbank together． Jia Wenqi walked in the front and Jia Haixia followed him by holding one of his friends empty sleeves （衣袖）． After they arrived at the riverbank， Jia Haixia would climb on his friend's shoulders to get cuttings and Jia Wenqi would tell him which cuttings were the best． After that， they dug holes on the ground and watered the cuttings together．

    They planted 800 trees in the first year， but only two survived （存活）． They didn't give up． Instead， they continued to plant more in the next few years． The riverbank is now home to over ten thousand trees．

    Today， the two friends no longer need to make a living by planting trees， but they have no plans to stop． They aim to plant as many trees as possible in the area so as to protect the village from flooding （洪水）and to improve the local environment．

（1）Where did the story take place？　　

（2）Could people see many green trees there 16 years ago？　　

（3）How did these two disabled men work together？（ No more than 12words）　　

（4）How many trees are there along the riverbank nowadays？　　

（5）What's the purpose of their planting trees now？