题目内容
They have introduced a new system _____ all employees must undergo regular training.
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I think they're really useful for making contact with career development staff and _______ candidates.
Every crystal was a ________ of design, and no one design was ever repeated.
A diagram of the new road ______ was shown on a map of the city.
He is nice and bright, and is always ready and determined to discuss the truth with his ________ tongue.
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