单项选择题

Life insurance is financial protection for dependents against loss ______ the bread -winner's death.

A．at the cost of
B．on the verge of
C．as a result of
D．for the sake of
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单项选择题
Although architecture has artistic qualities, it must also satisfy a number of important practical ______.
A．obligations
B．regulations
C．observations
D．considerations
单项选择题
An important property of a scientific theory is its ability to ______ further research and further thinking about a particular topic.
A．stimulate
B．renovate
C．arouse
D．advocate
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