quannguyen.yd 2/15/2024 5:05:22 PM

With increasing development and (17)__________ of computer technology there is a new disease to worry (18)__________ computer “viruses” programs which were designed to damage and infect (19)__________ in companies, homes, and universities. These viruses spread (20)__________ and make it difficult for affected systems to proceed. The virus secretly attaches (21)__________ to other programs and then deletes or changes files. The damage is generally activated by using the computer’s clock. Then any program that is saved may be exposed to the virus, including programs spread through telephone connectives. Because of the increasing incidents of virus infection, businesses and agencies are becoming (22)__________ in sharing software. Security needs to be increased and protection programs are being developed.

  1.    A. useful                            B. using                             C. usefully                         D. use
  2.    A. about                             B. in                                   C. at                                   D. of
  3.    A. computers                     B. newspapers                   C. magazines                            D. books
  4.    A. weakly                          B. strongly                         C. quickly                          D. slowly
  5.    A. themselves                    B. itself                              C. himself                          D. yourself
  6.    A. easily                            B. careless                         C. careful                           D. difficult.

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