Choose the word which is closest in meaning to the underlined word. 

In the northern part of the Simpson Desert, the dunes are parallel.  

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We used to climb up the crest of the hill to get a good view of the surroundings. 

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In the northern part of the Simpson Desert, the dunes are separated by ________ of low, open shrubland.  

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After Peter had returned from the Sahara desert, he was confined to bed by a ________ disease.  

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If the deserts are ________ managed, there may be troubles for scientific expeditions.

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The hill was so ________ that it took us more than five hours to climb up.  

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San Francisco is built on 40 hills and some are very ________.  

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Thanks to pictures taken by satellites, deserts have not ________ a mystery in our time. 

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Three great stretches of sandy deserts almost circle the center of Australia. 

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More and more ________ are very excited at discovering as many interesting things in the deserts as possible.

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A _______ is a landscape or region that receives very little precipitation.

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I wanted to go a more ________ route across Montana.

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The Sahara contains complex linear dunes that are ________ by almost 6kilometers. 

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Deserts are often composed of ________ and rocky surfaces

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Tính từ “to lớn, khổng lồ” trong tiếng Anh là gì?  

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Danh từ “cause” nghĩa là gì?