阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

    I'm a rock-climbing guide . Climbing the rocks and mountains in Yosemite National Park {#blank#}1{#/blank#} (be) my life's passion since I was 13 . More than ten years ago I started seeing a lot of waste , {#blank#}2{#/blank#} toilet paper , beer cans , and empty boxes , around the area . {#blank#}3{#/blank#} was beyond me why visitors started respecting the place less and treated such a beautiful home-like place this way . I {#blank#}4{#/blank#} (try) picking up trash myself , but I would spend an hour or two on the job , only   {#blank#}5{#/blank#} (find) the area trashed all over again weeks {#blank#}6{#/blank#}. I decided something had to change . I set a date for a cleanup together with some other climbers . {#blank#}7{#/blank#} (expect) , more than 300 people showed up . We collected about 6,000 pounds of trash over three days . It was  {#blank#}8{#/blank#} (amaze) how much we were able to accomplish—the park looked clean ! I often hear people complain about their surroundings . I want to say the only way to change things is by doing rather than   {#blank#}9{#/blank#} (complain) . We need to teach by example . We cannot blame others {#blank#}10{#/blank#} we start with ourselves .

    I can't help but feel {#blank#}1{#/blank#}(concern) about the {#blank#}2{#/blank#}(destroy) of tropical forests. It is one of the most serious environment problems today. From {#blank#}3{#/blank#} I know, people are damaging thousands of square {#blank#}4{#/blank#}(kilometer) of forests every day. This is killing hundreds of wild animals that live in the forests.

    {#blank#}5{#/blank#}(fortunate), we do nothing but talk about it. We don't do anything {#blank#}6{#/blank#}(protect) the forests. We need to stop people doing it. There should be {#blank#}7{#/blank#}(strong) laws. I think that people who cut {#blank#}8{#/blank#} forests should go to prison. That's what should happen to people who destroy the forests and kill wildlife.

    In my opinion, we, human beings, must protect wildlife {#blank#}9{#/blank#} future generations. Hopefully, our children {#blank#}10{#/blank#}(be) more responsible than we are today.

    Here, let me share one of my experiences with you. When I was a ten-year-old girl, I was once asked to deliver a speech titled “A Real Test in My Life” before the whole class! Just imagine how {#blank#}1{#/blank#}(terrible) shy I was the moment I thought of that with so many eyes {#blank#}2{#/blank#}(fix) upon me. I had no other {#blank#}3{#/blank#}(choose), though. First I was to draft the speech and that was just a piece of cake for me, because I was a good writer — something to pride myself in. But the hard part {#blank#}4{#/blank#}(lie) in my oral presentation; to read from {#blank#}5{#/blank#} paper was not allowed; I had to give the speech from my memory and in front of such a big audience ! A real trial began when I stood on the platform with my legs trembling and my mind blank. How much time had passed by, I didn't know. My listeners were still waiting, patiently and without any signs of rushing me. Gradually I found {#blank#}6{#/blank#} (I) back，giving out my speech with difficulty. Finally I finished. After {#blank#}7{#/blank#} seemed to be a hundred years, I found my audience applauding. I made it! From then on, my fear of talking before an audience disappeared. Actually with my confidence building {#blank#}8{#/blank#}， I now turn out to be a great speaker.{#blank#}9{#/blank#} (Look) back, I know the greatest difficulty on our way to success is our fear; overcome it，{#blank#}10{#/blank#} we will be able to achieve our goals.

    While not everyone will have pondered (思索) the subject while staring out of the window during {#blank#}1{#/blank#} flight, the question as to why aeroplanes have circular windows rather than square ones is interesting.

    Over the years, aerospace engineering {#blank#}2{#/blank#} (make) huge leaps in aeroplane technology, meaning planes can carry {#blank#}3{#/blank#} passengers and go faster. The planes have also changed shape to increase safety — including the windows.

    In the 1950s, {#blank#}4{#/blank#} jetliners were starting to become mainstream, the De Havilland Comet came {#blank#}5{#/blank#} fashion. With a pressurised cabin, it was able to go higher and faster than other aircraft.

    {#blank#}6{#/blank#}, the plane had square windows and in 1953 two planes fell apart in the air, {#blank#}7{#/blank#} (kill) 56 people in total.

    The reason for the {#blank#}8{#/blank#} (crash)? The windows.

    {#blank#}9{#/blank#} there's a corner, there's a weak spot. Windows, having four corners, have four potential weak spots, making them likely to crash under stress — such as air pressure.

    By curving the window, the stress that would {#blank#}10{#/blank#} (eventual) crack the window corner is distributed and the likelihood of it breaking is reduced.

    Many of you fail to seek your purpose in life. You dream and then follow it up with a list of reasons {#blank#}1{#/blank#} the dream is unachievable. You fill your life with different {#blank#}2{#/blank#} (excuse) and "I can't", which gradually leave your dreams {#blank#}3{#/blank#} (break).

    Many great companies came from a dream, were nurtured (培育) in a garage or basement and {#blank#}4{#/blank#} (grow) to be traded on the New York Stock Exchange. Why not you? Why not your dream? The only true limits you experience in life are those you create or those you allow others {#blank#}5{#/blank#} (put) on you. If you can dream it, you can do it!

    Dreaming is the easy part while {#blank#}6{#/blank#} (act) on the dream is hard. Recognize that a dream is {#blank#}7{#/blank#} journey. On the simplest level, it takes time, desire, and courage. But rarely is something great {#blank#}8{#/blank#} (easy) realized. Dreaming is recognizing and believing the potential for greatness and seeking it in all areas of your life. Believe in your dreams and your ability to realize {#blank#}9{#/blank#} (they). Keep your dreams {#blank#}10{#/blank#} front of you. Do not be afraid to dream. Never forget, if you can dream it, you can do it!