—When _________ the abacus _________?
—In the sixth century by the Chinese people.

A. is; invented
B. did; invent
C. was; invented
D. does; invent
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科目：初中英語 來源： 題型：單選題

--When _____ the abacus _____?  

-- In the sixth century by the Chinese people.


  1. A.
    is, invented
  2. B.
    did, invent
  3. C.
    was, invented
  4. D.
    does, invent

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科目：初中英語 來源：同步題 題型：單選題

-When _________ the abacus _________?
-In the sixth century by the Chinese people.
[     ]
A. is; invented
B. did; invent
C. was; invented
D. does; invent

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科目：初中英語 來源：2011-2012學(xué)年寧夏回族自治區(qū)銀川市李俊中學(xué)初三第一學(xué)期期末考試英語試卷 題型：單選題

--When _____ the abacus _____?   -- In the sixth century by the Chinese people.

A．is, inventedB．did, inventC．was, inventedD．does, invent

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