On his way home, he found a wallet on the ground, which he picked up and in his schoolba

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(答案→)A. lying, laid
B. laying, laid
C. laid, lay
D. lain, lay
解析：第一空考查现在分词做宾语补足语，find sb/sth doing，意思是：他发现钱包躺在地上，lying是lie的现在分词，表示躺，laying是lay的现在分词，表示：放置，不符合句意，第二空是表示他把钱包捡起，放进口袋，用lay的过去时laid，选A。