Only later ______ his notebooks, which contained details of all his thefts.

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问题 Only later ______ his notebooks, which contained details of all his thefts.

选项 A、they came across
B、did they come across
C、they had come across
D、had they come across

答案B

解析 本题考查倒装结构。本题中含有only的时间状语提前,因此句子的主语和谓语要部分倒装;又因为根据句意可以判断come across是发生在过去的动作,所以动词用一般过去时,故B项为正确答案。A项和C项来倒装,可首先予以排除。而D项的时态是过去完成时;不合句意,所以这一选项也要排除。
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