Read the followingparagraph. Choose the best word from [A]-[F] for each numbered blank. Youshould type in the blanks with the corresponding letters Users have to enter a ___1___ to gainaccess to a network. You can download a lot of __2____ or public domain programs from the net. Hundreds of ___3____ break into computer systems every year. A computer __4___ can infect your files and corrupt your hard disk. A ___5___is a device which allows limited access to an internal network from the Internet. Companies use ___6____ techniques to decode (or decipher) secret data. [A] hackers [B]virus [C] firewall [D] password [E] files [F] decryption