Question 6: Read the following passage and circle A, B or C to answer each question.
There are many causes that lead to water pollution. One main cause of this issue is waste
water coming from many factories and then being directly pulled out into water bodies,
especially into rivers or seas without any treatment because this is the most convenient way of
disposing waste water. Industrial waste consists of some kind of chemical substance such as
sulphur, which is harmful for marine life. Lead is known as the main reason for cancer disease.
Cancer has become a popular disease in several communes which are called “cancer villages”.
Another cause is the awareness of citizens, people always use water for many purposes and then
they dump waste water or garbage directly into rivers, canals and ponds and so on. In 2004,
because of a bird flu outbreak in Viet Nam, people threw poultry to water body that made water
highly polluted.
41. What is the main cause of water pollution mentioned in the text?
A. Waste water from factories

B. Awareness of citizens
C. Bird flu outbreak

D. Dumping garbage in rivers
42. Which chemical substance is mentioned as harmful for marine life?
A. Lead

B. Sulphur

C. Oxygen

D. Nitrogen
43. What is the main reason for cancer disease mentioned in the text?
A. Garbage dumping

B. Bird flu outbreak
C. Industrial waste

D. Awareness of citizens
44. What are "cancer villages"?
A. Communes affected by water pollution
B. Villages with high population of cancer patients
C. Villages with no access to clean water
D. Villages with high industrial activity
45. How do factories dispose of waste water, according to the text?
A. They treat it before releasing it into water bodies
B. They dump it into canals and ponds
C. They release it directly into rivers or seas without treatment
D. They store it in tanks for future us