填空题

Part A Note-taking And Gap-filling
Directions: In this part of the test you will hear a short talk. You will hear the talk ONLY ONCE. While listening to the talk, you may take notes on the important points so that you can have enough information to complete a gap-filling task on a separate ANSWER BOOKLET. You will not get your ANSWER BOOKLET until after you have listened to the talk.
Most people believe that landscape is (1) , but Earth is a (2) body with a continually (3) surface. There are two principal influences that shape the (4) : constructive processes such as (5) and (6) forces such as erosion.
Hills and mountains are often regarded as the (7) of permanence. But, interestingly enough, the higher a mountain is, the more (8) it was formed. Lower mountains tend to be (9) and are often the eroded (10) of much higher mountain chains.
The earth’s crust is thought to be divided into huge, (11) segments, called plates, which (12) on a soft plastic layer of rocks. Some mountains are formed as a result of these crustal plates (13) into each other, and forcing up the rock at the plate (14) . Some mountains may be raised by (15) or formed as a result of (16) activity.
Any landscape represents only a (17) stage in the continuous (18) between different forces. The main agent of erosion is (19) The landscape is continually eroded by rain, ice, tree roots and (20)