Choose the correct answer. 

Danh từ “cause” nghĩa là gì?

Choose the correct answer. 

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

Choose the correct answer. 

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

Choose the correct answer.  

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

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. 

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

Choose the correct answer. 

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

Choose the correct answer. 

Deserts are also classified by their ________ location and dominant weather pattern.