Scientists across the world agree that this is an invention of _______ great significance, _______ invention that will greatly change human life.
A.a; the | B.a; an | C./ ; the | D./ ; an |
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Scientists across the world agree that this is an invention of _______ great significance, _______ invention that will greatly change human life.
A.a; the | B.a; an | C./ ; the | D./ ; an |