While he was investigating ways to improve the telescope, Newton made______ discover which completely changed______man’s understanding of colour.
A.a…不填 | B.a…the | C.不填…the | D.the…a |
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While he was investigating ways to improve the telescope, Newton made______ discover which completely changed______man’s understanding of colour.
A.a…不填 | B.a…the | C.不填…the | D.the…a |