A pick up social signals from non-living rats B distinguish a friendly rat from a hostile one C attain sociable traits through special training D send out warning messages to their fellow

A It followed the social robot. B It played with some toys. C It set the trapped rats free. D It moved around alone.

A tried to practice a means of escape B expected it to do the same in return C wanted to display their intelligence D considered that an interesting game

A can remember other rats' facial features B differentiate smells better than sizes C respond more to actions than to looks D can be scared by a plastic box on wheels

A appear to be adaptable to new surroundings B are more socially active than other animals C behave differently from children in socializing D are more sensitive to social cues than expected

A The growth in the number of corporations B The general pay rise with a better economy C Increased business opportunities for top firms D Close cooperation among leading economics

A foster a stronger sense of teamwork B finance more research and development C establish closer ties with tech companies D operate more globalized companies

A continual internal opposition B strict corporate governance C conservative business strategies D repeated government warnings

A confirm the status of CEOs B motivate inside candidates C boost the efficiency of CEOs D increase corporate value

A CEOs Are Not Overpaid B CEO Pay: Past and Present C CEOs' Challenges of Today D CEO Traits: Not Easy to Define