单项选择题

A role-play session is particularly useful in bringing together different ______ of teaching.

A．cords
B．fibres
C．threads
D．strands
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单项选择题
Refreshments at the exhibition will be available on a ______ basis.
A．coin
B．cash
C．money
D．change
单项选择题
One of the multinationals is expected to make a take-over ______ for the engineering company.
A．bet
B．bid
C．offer
D．pay
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