单项选择题

Who believed that man can influence social change for the good of society

A．Cartwright.
B．Spencer.
C．Sumner.
D．Comte.
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单项选择题
The main interest of travel companies dealing with travel medicine is to
A．prevent people from falling ill.
B．make money out of it.
C．give advice on specific counties.
D．get the government to pay for it.
单项选择题
Travel medicine in Britain is
A．not something anyone wants to run.
B．the responsibility of the government.
C．administered by private doctors.
D．handled adequately by travel agents.
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