题目

Only after his death _______ considered correct.A.his theory was B.was his theory C.did his theory D.had his theory 答案:【答案】B【解析】考查倒装。句意:直到他死后,他的理论才被认为是正确的。当Only修饰状语部分位于句首时,主句要采用部分倒装,be+形容词correct构成被动语态结构,correct作主语补足语,故B项正确。下列各生物分类等级中,最基本的单位是A. 种 B. 属 C. 蝌 D. 届
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