（）是指促使某一特定风险事故发生或增加其发生的可能性或扩大其损失程度的原因或条件。

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     In many countries old age is a happy time, but in the United States it is quite    1    for old people.
Most old people do not live with their children or relative. If they    2    enough money, they buy house or
apartments in places where     3    old people live. If they    4    healthy and strong enough to live alone,
they live in special homes for old people. There,    5    take care of them. For many North Americans,
old age is not a     6    time, Most of them want to    7    young. They try to keep thin and they act (行为)
like young people as    8    as possible. They even try to speak the language of     9   . They do not like
to grow old because they will not get honor or respect or attention(荣誉,尊敬,注意).Also businesses do
not want old people to work for them. So old people usually live alone and they do not have many things
to do. Old age   10   be a sad and lonely time for them.