—I telephoned himtwice and I couldn’t get through to his home.—I think that theline might have been out of order, ________ ?A.don’t youB.do youC.wasn’t itD.hadn’t it
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C解析题干是宾语从句，前面陈述部分是I think／suppose／believe等时要与从句谓语动词和主语保持一致，从句中有might等情态动词时，要与情态动词后的成分保持一致。