题目内容
They built a ten-foot high fence to _________the house against intruders.
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Managers have learned to grapple with _________, artificial intelligence, computer-aided engineering and manufacturing.
One of the biggest _________advantages of the Internet is lower transaction costs.
They use their smartphones to read product reviews while instore and pay for purchases using all sorts of _________ methods.
The _________entitles you to 10cents off your next purchase.
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