题目内容
A college education can be very ______ in the United States. Many students have to borrow money to help pay for college.（cost）
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The ship‘s ________ broke down, and the pumps had to be operated by hand without the help of electricity.（generate）
At the meeting, a(n) _____ majority, 52 percent, agreed to build a highway through the forest, but nearly 40 percent were strongly against the idea.（barely）
As the number of people on earth increases, it becomes more difficult for the population to ______ on the resources of the land.（survivor）
Viewing and ________ documents on a computer screen can be much quicker than working on paper.（editor）
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