--When this kind of computers ? --Last year. [ ] A．did, use B．was, used C．is, used D．are, used 题目和参考答案——青夏教育精英家教网—

题目内容

--When _________ this kind of computers ___________?

--Last year.

[　　]

A．did, use	B．was, used
C．is, used	D．are, used

答案：B
解析：

由答语last year知用过去时，且用被动语态。

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