单项选择题

A．She will deliver a speech at the convention.
B．She is the only representative of her division.
C．She helps to build a marketing system.
D．She works in the marketing department.
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单项选择题
In what way can caffeine benefit one’s health according to the speaker
A．It improves one’s brain function.
B．It increases one’s blood flow.
C．It cleans the water of the body’s ceils.
D．It keeps one away from depression.
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