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
Japanese initially used jeweled objects to decorate swords and ceremonial items.
A.Japanese                         
B. used                                
C.decorate               
D. items

Choose the word that has the underlined part pronounced differently fromthe rest. Circle A , B , C or D.

A.meat
B.leader
C.heat
D.sweater

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
Her fiancé is said to graduate from Harvard University five years ago.
A.fiancé                      
B.is                             
C.to graduate   
D.years

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
He takes four paracetamol everyday, not knowing that will seriously damage his liver.
A.four paracetamol  
B.everyday                 
C.not knowing   
D.that

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
In summer, warm southern air carries moist north to the eastern and central United States.
A.In summer 
B.air carries 
C.moist
D.central

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
Tom’s jokes are inappropriate but we have to put up with it just because he’s the boss.
A.inappropriate
B.it
C.because
D.the

It often took my mom half an hour to get to work by underground every morning last month. 
A.My mom spent half a hour getting to work by underground every morning last month. 
B. My mom spent half an hour to getting to work by underground every morning last month. 
C.My mom spent half an hour get to work by underground every morning last month. 
D. My mom spent half an hour getting to work by underground every morning last month.

According to the passage, children learn history to know about  ________ .
A.people and historical events 
B.practical uses in life
C.events of the history
D.the mankind

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
I’d prefer to do it on myself because other people make me nervous.
A.I’d prefer                       
B. on myself                            
C.other               
D.make

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 43 to 50.
An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous changes. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled - a far cry from the extensive list of harmful substances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions. 
Many of more important air pollutants, such as sulfur oxides, carbon monoxides and nitrogen oxides are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature's output of these compounds dwarfs that resulting from human activities. 
However, human production usually occurs in a localized area, such as a city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a substance to be a pollutant; in fact, the numerical value tells us little until we know how much of an increase this represents over the concentration that would occur naturally in the area. For example, sulfur dioxide has detectable  health effects at 0. 08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however has a natural level of 0. 1 ppm and is  not usually a pollutant until its level reaches about 15 ppm. 
According to the passage, the numerical value of the concentration level of a substance is only useful if ________.              
A.it can be calculated quickly
B.it is in a localized area
C.the natural level is also known
D.the other substances in the area are known