_________oncarefulplanandprepar

发布时间：2020-07-28 06:19:25

_________ on careful plan and preparation, his experiment was a plete success．A.BasingB.Carried outC.BasedD.On the base

网友回答

C解析his experiment与base为逻辑上的动宾关系，所以选C项。
以上问题属网友观点，不代表本站立场，仅供参考！