问题补充:
On his way home, he found a wallet on the ground, which he picked up and in his schoolbag.
A. lying, laid
B. laying, laid
C. laid, lay
D. lain, lay
答案:
(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。