用discover或invent的适当形式填空(1) We that our luggage had been sto- len.(2) 1 think the calculator was before the computer. 题目和参考答案——青夏教育精英家教网—

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用discover或invent的适当形式填空

(1) We that our luggage had been sto- len.

(2) 1 think the calculator was before the computer.

(1) discovered (2) invented

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