单选题：Anyone breaking the roles will be asked to leave__________.

题目内容：

Anyone breaking the roles will be asked to leave__________. A．at the spot
B．on the spot
C．for the spot
D．in the spot

参考答案：

答案解析：

It has always been the __________ of our fn'm to encourage

It has always been the __________ of our fn'm to encourage workers to take part

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