Choose the correct answer. 

Can you make a ________ estimate of how much our expedition in the desert may be? 

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

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

Choose the correct answer.  

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

Choose the correct answer. 

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

Choose the correct answer. 

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

Choose the correct answer. 

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

Choose the correct answer. 

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

Choose the correct answer. 

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

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

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

Choose the correct answer. 

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

Choose the correct answer. 

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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Deserts are often composed of ________ and rocky surfaces

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

Choose the correct answer. 

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

Choose the correct answer. 

Danh từ “cause” nghĩa là gì?