But later people developed a way of printing, rocks. A. used B. using C. and use D. uses——青夏教育精英家教网—

摘要： But later people developed a way of printing, rocks. A. used B. using C. and use D. uses

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But later people developed a way of printing, _____rocks.

A. used B. using C. and use D. uses

But later people developed a way of printing, _____rocks.

A. used B. using C. and use D. uses

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