听力原文：Young males generally use alcohol or drugs for excitement. Or they think it will make them more popular. Young females, however, use cigarettes, drugs or alcohol to feel happier, reduce tension or lose weight.

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For this part, you are allowed 30 minutes to write an essay entitled How to Make Good Use of College Life. You should write at least 120 words following the outline given below in Chinese:

三年前，中非合作论坛的创立，开启了合作新纪元。三年来，中国政府提前兑现承诺，减免了31个非洲国家105亿元人民币的债务。

我们认为，发展中国家应在全球化进程中获益，而不应被边缘化。国际社会应采取行动，帮助发展中国家解决困难，提高发展中国家自主发展、保护生态环境、实现可持续发展的能力。发达国家有义务、有责任进一步开放市场，取消贸易壁垒和农产品补贴，切实履行对发展中国家增加援助和减免债务的承诺。中国愿与非洲国家在参与国际经济规则的制定和多边贸易谈判中协调立场，维护发展中国家应有的权益。

It is the (responsible)________of the Human Resources Department to employ new staff members.

Demography is the statistical study of human population

It can be a-general science that can be applied to any kind

of dynamic population, that is, one that changed over 【M1】__

the time or space. It encompasses the study of the size, 【M2】__

structure and distribution of populations, and spatial or

temporal changes in them in response to birth, death,

migration and aging.

Human demography is the most well known discipline

of demography, and typically what people refer when 【M3】__

using the term demography. Demographic analysis

can be applied to whole societies or to groups defined by

criterion such as education, nationality, religion and ethnicity. 【M4】__

In academia, demography is often regarded as a branch

of either economy or sociology. Formal demography 【M5】__

limits its object of study to the measurement of populations

processes, when the more broad field of social demography 【M6】__

studies also analyze the relationships between

economic, social, cultural and biological processes influencing on 【M7】__

a population.

Ibn Khaldun (1332-1406) is regarded as the "father of demography"

for his economic analysis of social organization which

produced the first scientific and theoretical work on

population, development, and group dynamics. At the end of the

18th century, Thomas Malthus concluded that, if unchecked,

populations would be subject to exponential growth. He feared

that population growth would intend to outstrip growth in food 【M8】__

production, leading to ever increased famine and poverty; he 【M9】__

is seen as the intellectual father of ideas of overpopulation and

the limits for growth. Later more sophisticated and realistic 【M10】__

models were presented by Benjamin Gompertz and Verhulst.

【M1】

How does the speaker spend his holiday in winter？

He usually takes one week to______.