早教吧 育儿知识 作业答案 考试题库 百科 知识分享

Man-madesatellitesintospacebymanycountries.A.wassentupB.issentupC.havebeensentupD.hasbeensentup

题目详情
Man-made satellites ________ into space by many countries.
A.was sent up
B.is sent up
C.have been sent up
D.has been sent up
▼优质解答
答案和解析
答案C
现在完成时的被动语态.