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The adobe dwellings(土坯房) 61 (build) by the Pueblo Indians of the American Southwest are admired by even 62 most modern of architects and engineers. In addition to their simple beauty, what makes the adobe dwellings admirable is their 63 (able) to “air condition”a house without 64 (use) electric made of adobe take in the heat from the sun on hot days and give out that heat 65 (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 66 (cool) the house during the hot day: 67 the same time, they warm up again for the night This cycle 68 (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 69 (nature) architects, the Pueblo Indians figured out exactly 70 thick the adobe walls needed to be to make the cycle work on most days.
built 62. the 63. ability 64. using 65. slowly
66. to cool 67. at 68. goes 69. natural 70. how
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Chengdu has dozens of new millionaires, Asia’s biggest building, and fancy new hotels. But for tourists like me, pandas are its top 61. attraction (attract).
So it was a great honour to be invited backstage at the not-for-profit Panda Base, where ticket money helps pay for research, I 62. was allowed (allow) to get up close to these cute animals at the 600-acre cent