更多"Human sympathy (62) whales is o"的相关试题:
[单项选择]Human sympathy (62) whales is only natural of all the creatures in the sea. (63) are closer relatives to us than these warm-blooded mammals. And how they got into the sea is one of the most fascinating stories of (64) Most authorities believe that 60 million years ago ancestors of modern whales were four-legged, wolf-size animals living on the sea shores, (65) an abundance of fish and shrimp tempted them to try wading. (63) 10 to 15 million years, their bodies grew, forelegs shrank into flippers used for balance and steering and hind legs disappeared. As a result of some amazing transformations, they are now helpless on land. If stranded on a beach, they can barely breathe.
With abundant (67) of food, whales grew into the largest creatures that lived, (68) larger than dinosaurs. A blue whale can grow to 100 feet. Its tongue is ten feet thick and heavier than an elephant. Some arteries are big enough for
A. with
B. to
C. for
D. in