In our online life, we need to use passwords frequently. We use

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 very_____（23）and can easily be"broken"by others. In fact, the most commonly used passwords are so simple that it requires very_____（24）effort to figure them out. Can you guess_____（25）the most commonly used passwords are?They are：Names of baseball teams, birth dates of a family_____（26）, the year of a special sports event, the random numbers like 156468, _____（27）the name of a friend, pet, favorite TV star, or band.
There are programs_____（28）to break into people's online accounts. These programs are_____（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）school222. 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 them_____（35）hard to remember. Meanwhile, you need to change them once in a while.
29._____
A、typical
B、capable
C、sure
D、true
【正确答案】：B
【名师解析】:根据上下文，第29题描述的是某些程序的功能，它们能够尝试使用英语字典和多种外语字典中的每一个单词来破解账户密码。选项B "capable" 表示这些程序具备这样的能力，符合语境。其他选项A "typical"（典型的），C "sure"（确定的），D "true"（真实的）都不能准确描述程序的功能。因此，正确答案是B。