Mark the letter A, B,C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Many of the important products obtained from trees, one of the most important is wood pulp, which is used in paper-making.
A.Many of the  
B.obtained                  
C.the most  
D.paper-making

He will finish the work before you ..............here tomorrow.
A.leave
B.left
C.will leave
D.leaving

According to the passage, most of the workers who died in the fire ___________.
A.were university students   
B.had only worked there for a short time  
worked on the tenth floor
C.worked on the tenth floor
D.were immigrant women

______(17)
A.endurance       
B.strength    
C.duration       
D.durability

Choose the best answer that best completes each sentence. 
The cliffs are being constantly ________________by heavy seas. 
A.eroded 
B.worn 
C.eaten 
D.gulfed

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
But for your support, we couldn’t _______ this plan.
A.have been completed
B.be completed
C.have completed
D.complete

Choose the correct answer

Who was the first person …………………..the South Pole?
A.reached                 
B.to reach  
C.who reaches             
D.had reached

What is the main idea of this article?
A.There are few negative consequences to the Digital Revolution. 
B.Learning about technology is a natural part of human development.
C.Workers will need to adapt to technological changes.        
D.Unemployment will increase dramatically as technology advances.

_____ (5. help)
A.helpfulness
B.helpfully
C.helpless
D.helpful

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.
Tropical rainforests are being destroyed and badly degraded at an unsustainable rate. Some scientists estimate that in the early 1990s tropical forests were being destroyed at a rate of approximately 28 hectares a minute, or about 14 million hectares each year – an area about the size of the state of Wisconsin. This figure marked a decrease since the 1980s, when approximately 16 million hectares were destroyed each year, largely due to a reported decline of deforestation in the Amazon River Basin in the early 1990s. However, satellite images indicate that rates may have rebounded in the late 1990s as burning in the Amazon increased again. Over the past three decades alone, about 5 million square kilometers – or 20 percent of the world's tropical forests – have been cleared. During this time, deforestation in tropical Asia reached almost 30 percent. High rates of deforestation are inevitably followed by alarming rates of plant and animal extinction because many rainforest species cannot survive outside their pristine rainforest habitat. Some scientists estimate that dozens of rainforest species are becoming extinct every day.
Causes of deforestation vary from location to location, but certain patterns tend to be consistent across all forests. Logging companies in search of valuable rainforest hardwoods, or, less often, oil companies in search of petroleum, are often the first to enter a remote area of rainforest. Some logged forests, if left alone, can regenerate in a few decades. But typically, they are not left alone – the roads built by logging companies often provide access for landless farmers to enter a new area, as well as a means to transport agricultural crops to market. For every 1 kilometer of new roads built through a forested area, 4 to 24 square kilometers are deforested and colonized.
Once the loggers leave the land, a typical cycle of destruction ensues. When the landless farmers arrive, they clear the land for planting. Poor rainforest soils produce a low crop yield, especially after a couple of years. At that point, the farmers often sell their lands to cattle ranchers or large plantation owners. After nutrients have been exhausted and soils compacted by cattle, lands are then abandoned and often laid to waste. Rainforest does not readily regenerate on these lands without human intervention. Meanwhile, the colonist farmers and cattle ranchers move to a new piece of land made accessible by logging roads, where the cycle of deforestation begins again.
(Source: Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation)
What does the passage mainly discuss?

A.The rate of rainforest destruction in the Amazon
B.Causes and effects of rainforest destruction
C.The size of tropical rainforest loss
D.Typical patterns of extinction of rainforest species