—______my dictionary?I can't find it anywhere.—I_____it on the shelf when I came in.A.Did you see;have seenB.Have you seen;have seenC.Have you seen;sawD.Did you see;saw

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—______my dictionary?I can't find it anywhere.—I_____it on the shelf when I came in.A.Did you see;have seenB.Have you seen;have seenC.Have you seen;sawD.Did you see;saw
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—______my dictionary?I can't find it anywhere.—I_____it on the shelf when I came in.A.Did you see;have seenB.Have you seen;have seenC.Have you seen;sawD.Did you see;saw
—______my dictionary?I can't find it anywhere.—I_____it on the shelf when I came in.
A.Did you see;have seenB.Have you seen;have seenC.Have you seen;sawD.Did you see;saw

—______my dictionary?I can't find it anywhere.—I_____it on the shelf when I came in.A.Did you see;have seenB.Have you seen;have seenC.Have you seen;sawD.Did you see;saw
答案选D.Did you see;saw
这里根据回答可以判断都要用过去时态.

C

C
前一个句子说得是对现在的影响,用现在完成时态;后一个句子者要注意在时态上和从句的came保持一致,所以用一般过去时态。