单项选择题

A) on C) by turns
B) in turn D) further

A．on
B．in turn
C．by turns
D．further
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单项选择题
A) medical cam C) cosmeticsB) food D) services
A．medical cam
B．food
C．cosmetics
D．services
单项选择题
A) because of C) withB) and D) provided
A．because of
B．and
C．with
D．provided
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