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.

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The ship's____broke down, and the pumps had to be operated by hand without the help of electricity.

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.

As the number of people on earth increases. it becomes more difficult for the population to____on the resources of the land.

The findings show____general____that the same problem begins sooner in the country than in towns.

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