29. What can we know from the fourth paragraph？
A. Fish and birds have similar brain structures
B. Most fish and birds have strong lateralization
C. Strongly lateralized birds are better at learning.
D. Strongly lateralized grey squirrels have a higher IQ
30. How did the strongly lateralized squirrels act in the study？
A. They were slower to get peanuts
B. They got more peanuts than others
C. They got through the tube quickl
D. They used their paws more skillfully.
31. What can be a suitable title for the text？
A Left-handed animals prove more intelligent
B Grey squirrels change their habits for food
C. Laterality is connected with better brains
D Strongly"handed" squirrels are less good at learning
D A Russian natural gas tanker has completed an experimental round trip along the Northem Sea Route NSR）-the first time the path across the Arctic has been made at this time of year. It returned to the Russian gas station at Sabetta on February 19. The voyage by the Christophe de Margerie tanker through the ice is the latest visual indicator of climate change in the cold region