(B ) 5. 一What do you think is the most useful in the 20丨h century?-Computer,I think.A. inventor B. inventionC. inventing D. invented 题目和参考答案——青夏教育精英家教网—

题目内容

(B ) 5. 一What do you think is the most useful

_in the 20丨h century?

—Computer,I think.

A. inventor B. invention

C. inventing D. invented

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