-
The pink river dolphin, also known as the Amazon river dolphin or Boto, is one of only
seven species of freshwater cetaceans. Amazon river dolphins are only distantly related to
saltwater dolphins. They have
16.
their surroundings with larger snouts with bristle hairs on
the end, especially for the purpose of river-bottom feeding.
Another thing that tells them apart from their ocean-dwelling
ling relative is their 17. pink
19.
18.
skin. Temperature and water quality can impact the color of Amazon River dolphins. The sun's
rays make them lose their pink pigmentation. So the darker the water, the pinker
In addition, emotions like surprise and happiness can make them pinker, similar to blushing
in humans! The Amazon river dolphins are very smart. With a brain 40% larger than
that of humans, Amazon pink dolphins are said to be the most intelligent of the river dolphins.
The pink river dolphins are friendly and there are plenty of stories of river dolphins saving
people when they were in the water. 20., they have been valued by the tribes in the Amazon
area for thousands of years.ood and
B16. (A) changed into
D17. (A) domestic
(C) disposed of (D) resulted inside
quote
(B) adapted to
ando (B) diligent
ifoxs
(C) direct
(D) distinctive
AD 18. (A) they will be
(B) will they be
(C) they do
(D) they belt bica
A 19. (A) capacity mis
20. (A) However
(B) position
(B) Moreover
(C) exercise
(C) Therefore
(D) situation
(D) Otherwise