黑客如何闯入新的系统仍旧不为人知（主语从句remain)这种教育方式似乎已经过时了（主从seem)这个老人显然是需要个人来陪伴他（主从keep...company)事实上大雨阻止了我们前进（表从prevent)

Question

黑客如何闯入新的系统仍旧不为人知（主语从句remain)
这种教育方式似乎已经过时了（主从seem)
这个老人显然是需要个人来陪伴他（主从keep...company)
事实上大雨阻止了我们前进（表从prevent)

Answer 1

How the hacker get into the new system remains unsolved/unknown.It seems that this kind of education method is out-dated.Obviously this old man needs someone to keep him company.In fact the heavy rain...