Questions 111-115: Complete the summary and choose NO MORE THAN TWO
WORDS from the above-mentioned passage to fill in each numbered blank supplied.
Write your answer in the numbered box.
Sand dunes
In terms of geological features, sand dunes are described as large mounds of sand. Sand
dunes are the result of wind blowing and causing (111) ___EROSION__ . Their shape is up
to the (112) ___WIND__ . There are many different kinds of dunes.
Sand dunes are usually in coastal regions or in deserts. They have many different
shapes and the (113) __CRESCENT__ dune is found more often than any other ones.
They come in different types. Among them, the one that is without the minimum
number of sides nor is a larger dune containing many smaller dunes in itself is a (114)
___COMPLEX__ dune.
Their effects are to help prevent erosion, create environment for fauna and flora to live
in, and to give rise to (115) __DESERTIFICATION__ .
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