选择题：In our online life,we need to use passwords freque

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 programs28 to break into people.s online accounts.These programs are29
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,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 35 hard to remember.Meanwhile,you need to change them once in a while.
21.A.to B.with
C.by
D. for
22.A.However
B.Therefore
C.Moreover
D.Besides
23.A.natural
B.safe
C.strange
D.clear
24.A.minor
B.small
C.little
D.tiny
25.A. what
B.who
C.where
D.which
26.A.figure
B.member
C.creature
D. character
27.A.a