In our online life , we need to use passwords frequently. We use passwords 21_______e-mail, gaming sites , social networking sites, and other shopping sites. 22_______ ,the passwords most people use are not very23_______ and can easily be "broken" by others. In fact , the most commonly used passwords are so simple that it requires very24_______ effort to figure them out. Can you guess25_________ the most commonly used passwords are? They are: Names of baseball teams , birth dates of a family26________ ，the year of a special sports event , the random numbers like 156468,27_______  the name of a friend , pet , favorite T'V star , or band .There are programs 28_________ to break into people's online accounts. These programs are a 29__________ of trying every word in the English dictionary and the dictionaries 30_________ many foreign languages , in their effort to break into an account. 31__________ can even search words backward. Some will try 32__________ words or words that are followed by numbers,33_____ school 222. These programs can test millions of passwords in a few minutes. So , you are advised to be careful about 34_______ passwords so that they will be hard to break, You are also advised not to make them35________ hand to remember, Meanwhile, you need to change them once in a while.

（）