题目内容
I believe engaging in paid work is acceptable __________ the conditions are safe, the hours are reasonable, and the wages are fair.
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Many of us visited the industrial exhibition__________, to our disappointment, we saw very few high-tech products of attraction.
Based on what he performed, we would not think of this writer as a radical politician of reform, __________ a leader of a revolution.
It seemed oil __________ from this pipe for some time. We’ll have to take the machine apart first before doing any repair to the pipe.
As had been expected, the terrorists __________ their prisoner in a small dark room. However, they did not chain him to the wall.
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