Tombuiltasciencelab________his

发布时间：2020-07-28 15:26:54

Tom built a science lab ________ his own ________ his spare time．A.on; inB.on; ofC.of; ofD.of; at

网友回答

A解析on one's own某人独自；in one's spare time在某人的业余时间里．
以上问题属网友观点，不代表本站立场，仅供参考！