单项选择题

A．His desire to start his own business.
B．The crisis in his family life.
C．The decline in his health.
D．His dream of living in the countryside.
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单项选择题
A．Because change happened so quickly.B．Because people were not interested in it.C．Because people were too busy with their work.D．Because change happened so slowly.
A．Because change happened so quickly.
B．Because people were not interested in it.
C．Because people were too busy with their work.
D．Because change happened so slowly.
单项选择题
According to the first paragraph, one of the concerns related to international biomedical research is ______.
A．whether the experimented treatments should be compared against local standards
B．whether the experimented treatments are shown to be effective
C．when local communities will be able to carry out their own research projects
D．the prohibitive costs involved
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