Text-1 Read the text. Then choose the correct answer for questions 1-2

28. What is the text about?
A) The danger of hunting for the Brazilian population.
B) Hydro-electric dam projects on the Yangtze river
C) The breeding of small river dolphins.
D) The danger of two' breeds of dolphins disappearing.
29. What does the number 10 in the text refer to?
A) Governmental organizations which fight the pollution of rivers.
B) Groups of biologist who are trying to repopulate dolphins.
C) The percentage of Amazonian dolphins which die out every year
D) The percentage of living Yangtze river dolphins.