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According to the passage, one of the reasons that human migration occurred is because of _
A.human adaptability
B.human evolution
C.social development
D.inter-group equalities
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A.human adaptability
B.human evolution
C.social development
D.inter-group equalities
A.Because it is almost impossible not to do so.
B.Because the reporter has strong feelings to express.
C.Because the reporter wants to get a good reputation.
D.Because the reporter wants to mislead the public.
A.corrupt
B.pollute
C.cleanse
D.infect
A.She realizes that marketers can use strategies to influence customers.
B.She finds out that the latest music and the coolest celebrities are attractive.
C.She is worried that the marketers control customers" demands.
D.She realizes that phrases and advertisements can attract customers" attention.
A.He must be fascinating and interesting to other people.
B.He must be diligent and able to work long hours.
C.He must go to specialized schools to learn the necessary skills.
D.He must be ambitious and persistent in what he wants to invent.
A.He gives a detailed description of the cruelness of animal experimentation.
B.He encourages students to imagine the pain that the animals suffer from in animal experimentation.
C.He compares it with the hypothermia experiments done on Jews.
D.He reminds the class of the fact that scientists define begging calls.
A.More people take up mountain climbing due to publicity and better equipment.
B.There are increasing cases of both success and tragedy in mountain climbing.
C.The activity of mountain climbing has becoming less and less popular.
D.Improvements in climbing equipment are the key reason for increased popularity of mountain climbing.
A.draw
B.mimic
C.play
D.recite
A.Old age is a period of negative perception.
B.Old age is a period of prejudice.
C.Old age is a period of productivity.
D.Old age is a period of lacking ability.
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