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.

    The Silk Road is in fact a relatively recent term. These ancient roads had no particular name until in the mid-19th century, a European {#blank#}1{#/blank#} (name)the trade and communication network the Silk Road. Since then the term {#blank#}2{#/blank#} (accept)globally.

    In the nineteenth century, a new type of travelers stepped onto the Silk Road, who were eager {#blank#}3{#/blank#} (look)for adventure. Researchers who came from many countries traveled through the Taklamakan Desert, {#blank#}4{#/blank#} is now in Xinjiang, to explore ancient sites along the Silk Road {#blank#}5{#/blank#} (lead) to many discoveries and studies, and most of all, a renewed interest {#blank#}6{#/blank#} the history of these routes.

    Today, many historic {#blank#}7{#/blank#} (build) and monuments still stand, marking the passage of the Silk Road through hotels, ports and cities. What's more, the remarkable network is reflected in {#blank#}8{#/blank#} large number of cultures, languages, customs and religions that have developed for many years along these routes The passage of merchants and travelers of many {#blank#}9{#/blank#} (difference)nationalities resulted not only in commercial exchange, but in a widespread and continual process of cultural interaction. {#blank#}10{#/blank#} (obvious),it has become a driving force in the formation(形式)of diverse societies.