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English Sentence Improvement Difficulty: Medium

Photographs from the satellites launched by NASA at the early 1970s have proved invaluable to the mapping of remote areas.

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. . . . . . . . Bible is . . . . . . . . religious book of . . . . . . . . Christians. The incident cemented their relations. Water is necessary for . . . . . . . . life but . . . . . . . . life of these insects does not depend on water. The old father brought home the moral of unity by asking each of his sons to break the bundle of sticks My sister is living in . . . . . . . . United States of America.