单项选择题

The traditions pervasive of hospitality to strangers

A．tends to be superficial and artificial.
B．is generally well kept up in the united States.
C．is always understood properly.
D．has something to do with the busy tourist trails.

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单项选择题A physician with medical license

A．can practice medicine anywhere in the US.
B．can practice all branches of medicine.
C．can't practice medicine until further training is done.
D．can't practice medicine until he is a member of a hospital.

单项选择题The American Council on graduate, medical education is

A．controlled by the American Medical Association.
B．controlled by the federal government.
C．the most authoritative medical association in the US.
D．a non-governmental body.