Single mums are better at raising their
kids than two parents—at least in the bird world. Mother zebra finches have to
work harder and raise fewer chicks on their own, but they also produce more
attractive sons who are more likely to get a mate. The finding
shows that family conflict is as important an evolutionary driving force as
ecological factors such as hunting and food supply. With two parents around,
there’s always a conflict of interests, which can have a detrimental effect on
the quality of the offspring. In evolutionary terms, the best
strategy for any parent in the animal world is to find someone else to care for
their offspring, so they can concentrate on breeding again. So it’s normal for
parents to try to pass the buck to each other. But Ian Hartley from the
University of Lancaster and his team wondered how families A. The young males get less care. B. The young females will decrease in weight. C. The offspring will become lazy fathers or mothers in the future. D. the offspring will not get mature easily.
[单项选择]City officials are considering building a path to give the public ______ to the site. A. recreation B. excess C. excursion D. access
[单项选择]In that country, a person who marries before legal age must have a parent's ______ to obtain a license. A. sanction B. warrant C. malignance D. affirmation
[单项选择]
Questions 21—24 are based on the following
monologue. You now have 15 seconds to read question
21—24. | After Mr. Spears robbed the barbershop, what did he do A. He went directly to the police station. B. He drove out of the town and tried to escape. C. He waited for the police to arrest him. D. He argued with the police angrily.
[单项选择]The argument between the two boys became so fierce that father had to ______ and tell them to behave. A. interpret B. intervene C. inherit D. impart
[单项选择]We couldn't really afford to buy a house so we got it on martgage purchase and paid monthly ______. A. investments B. requirements C. arrangements D. installments
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