题目内容
Immigration poses two main challenges for the rich world's governments. One is how to manage the inflow of ______; the other, how to integrate those who are already there.
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They built the motel on the edge of a _______ village, which attracted lots of visitors from different parts of the country.
________ importance was attached to avoiding mistakes in grading the students' final examination papers.
Man has also ______ the face of the earth by draining marshes and cutting through mountains to build roads and railways.
There was a thin strip of silver beach rising quickly to hills covered to the top with luxuriant ________.
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