The adobe dwellings(土坯房）{#blank#}1{#/blank#}(build) by the Pueblo Indians of the American Southwest are admired by even {#blank#}2{#/blank#}most modern of architects and engineers. In addition to their simple beauty, what makes the adobe dwellings admirable is their {#blank#}3{#/blank#}(able) to “air condition” a house without {#blank#}4{#/blank#}（use）exact equipment. Walls made of adobe take in the heat from the sun on hot days and give out that her{#blank#}5{#/blank#}（slow）during cool nights，thus warning the house. When a new day breaks, the walls have given up their heat and are now cold enough {#blank#}6{#/blank#} (cool) the house during the hot day: {#blank#}7{#/blank#} the same time, they warm up again for the night This cycle {#blank#}8{#/blank#} (go) day after day: The walls warm up During the day and cool off during the night and thus always a timely offset（抵消）for the outside temperatures. As {#blank#}9{#/blank#}(nature) architects, the Pueblo Indians figured out exactly{#blank#}10{#/blank#}thick the adobe walls needed to be to make the cycle work on most days.

     Studying in groups is becoming more and more popular in class. It has many{#blank#}1{#/blank#} (advantage). For example, we can not only save time but also encourage each other when we study {#blank#}2{#/blank#}groups. I still remember when I was in Grade 8, my physics {#blank#}3{#/blank#}(be) very poor. I had{#blank#}4{#/blank#}really hard time with it. Once in class, the teachers asked{#blank#}5{#/blank#}to discuss it with each other, but I was very shy, I could not do it like what they told me. My physics teacher encouraged me to face others and talk with someone else{#blank#}6{#/blank#}(brave). Then I studied with some classmates together. When I did not understand any questions, they could give me some advice, I could quickly find out the ways{#blank#}7{#/blank#}(deal) with the problems. After that, I felt very relaxed and asked my classmates a lot of questions about physics. I did not feel stressed out at all. At last, I finished my homework {#blank#}8{#/blank#}myself for the first time. How {#blank#}9{#/blank#}(excite) I was!

    At least thirty times Bobby had tried to climb the snowy mountain, but he Because of {#blank#}10{#/blank#}(study) in groups, I am not worried about physics any more. With my classmates' help, I get more confidence. It also gives me more chances to improve myself in many ways.

    I will never forget that at the age of nine I was asked to deliver a speech entitled A challenge in My Life before the whole class!

    You can 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 could do nothing but{#blank#}3{#/blank#}(prepare) for it, though. First, I was to draft the speech, which was just a piece of cake for me, a good writer. But the hardest part{#blank#}4{#/blank#}(lie)in my oral presentation from my memory, for to read from the paper was not allowed. The real moment began {#blank#}5{#/blank#} I stood on the platform with my legs trembling and my mind blank. But my {#blank#}6{#/blank#} (listen) were waiting patiently without any signs of rushing me. Gradually I found myself back, giving out my speech tongue-tiedly. 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 {#blank#}8{#/blank#} big audience disappeared. Actually with my confidence building up, I now turn out to be a great speaker. Looking back, I know the greatest difficulty on our way {#blank#}9{#/blank#} success is our fear. Overcome it, {#blank#}10{#/blank#} you will be able to achieve your goals.