Whenandwheretobuildthenewlaborato

发布时间：2020-07-27 07:58:39

When and where to build the new laboratory ________ yet.A.isn't decidedB.are not decidedC.hasn't decidedD.have not decided

网友回答

A解析【巧解导析】hasn't decided和have not decided为完成时的主动语态，故C，D不对；疑问词加不定式充当主语，谓语动词用单数，故B不正确．
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