A．the Islamic invasion.
B．the British invasion.
C．the eleventh century.
D．the eighteenth century.

A．invasions played an important role in medical exchange.
B．medical exchange: was? fulfilled by means of translation.
C．eastern medicines are more popular than western medicines.
D．eastern medicines developed earlier than western medicines.

A．The Influence of Medicine.
B．Ancient Greek and Islamic Medical Ideas.
C．Centuries of Medical Interaction.
D．Popular Medicine in the East.