Miss. Richardson knows much about the novel. I suppose that she must have read it, _______?A.don’t IB.mustn’t sheC.hasn’t sheD.didn’t she
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C解析考查反义疑问句。反意疑问句的陈述部分为I(We) think+ that从句时，问句部分的动词及主语与that从句内的动词和主语保持一致。陈述部分用must + have + V-ed表示推测时，若句中带有明显的过去时间的状语，问句部分动词用过去时形式。根据陈述部分I suppose that she must have read it,表示对过去的推测，可知选C。