计算机网络可分为三类,它们是()
D
暂无解析
preferred,prefers,is,are,was,were,willbe,shallbeDuringtheholidayweek,one-thirdofthestudentsinourclass________preparedtostayoncampusforstudywhilearoundtenpercentofthem________somemoresleepathome.
Heshookhandswiththevisitors________astoconveyhisapology.