Read the following passage and choose the correct answer to each of the questions below.
            Since the early 1980s, we began to worry about the bad effects of environmental pollution. It is the result of industrialization and of the careless use of the natural resources. Avoiding pollution is not easy. Many people try not to inhale traffic fumes and keep away from chemical waste by wearing mask when they get out of their house. Actually, indoor pollution is becoming more and more serious. They have found that dishwasher, washing machines, air conditioners, freezers, and refrigerators emit some certain toxic chemicals into the air. We surely inhale these chemicals when doing housework. Using gas cookers and burning candles produce carbon monoxide.
            Therefore, before worrying about environmental pollution when going out, we should consider the problems of indoor pollution.
Inside house ________.
 
A.there is no pollution    
B.there are no toxic chemicals          
C.carbon monoxide is produced by gas cookers
D.there is no carbon monoxide

How can I remember these grammar rules?
— Well, try to do all the ....................exercises in this grammar hook.
A.study
B.working
C.learning
D.grammar

_______(57)
A.One     
B.All    
C.Every 
D.Each

Exercise 3. Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 11 to 15.
Water is necessary for life. People can live only a few days (11)_____  it. Yet nearly 25 million people die each year because of it. Both industrial nations and less-developed countries are worried about the (12)______ and quantity of water in the world.
Even though people, animals, agriculture, and industry use a lot of water, there is more than enough on the Earth. Water covers about three-fourths of the Earth's surface. However, 97.4 percent of it is salt water. Three-fourths of the Earth's fresh water is frozen in glaciers and in the great polar ice caps. Most of the water we use (13)_____ from rivers, lakes, and the atmosphere. Less than one percent of the Earth's water is usable, and we use it over and over again.
One of the (14)______ about water is distribution. Water is not always distributed where the large (15)______ centers are. Some regions get enough rain, but it is all in one or two short rainy seasons.
(11)
A.in                            
B.without                   
C.for                           
D.with

He / learn/ English / two years now.
A.He has learnt English for 2 years now
B.He has been learning English for 2 years now.
C.He has been learning English since 2 years now
D.Both A and B

A.objectively   
B.humanism   
C.philosophy    
D.forgettable

(44. SUBSTANCE) ______    
A.substantiality
B.substantively
C.substantially
D.substantial

As they               richer, they invested more money in shares.
A.became  
B.got                                    
C.are                                    
D.grew

________(6)
A.stylist
B.modal
C.modern
D.nice

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Your grades are coming down. You should try to            the other students in your class.
A.come up with
B.keep up with
C.get along with
D.get in touch with