It is essential that the program _________ into the computer

It is essential that the program _________ into the computer it is essential that computer security professionals should（ __ information it is Just put it into the computer . It is essential that all the exam papers_back before the end It was essential that the application forms()back before the It is absolutely essential that all the applicants one by on It is essential that human____ ways and means to protect the 英语翻译It is the behaviour of the program that we call a comput It is indeed no accident that the premier computer education 选B错么?The program ____ into the computer must be prepared in 1.It was essential that the application forms ____________ba 1.It was essential that the application forms __________