21. It is necessary for websites to check their cooperator’s ______ to protect their rights and the rights of the netizens.

   A. administration    B. reliability     C. relationship     D. knowledge

22. When parents know where their children are playing, they can set safe ______ and ensure friendly adults are on hand when needed.

   A. boundary         B. background      C. information      D. record

23. When we ______ the Olympics it will inspire kids all over the country. A kid in Scotland will be encouraged to take up sport.

   A. attend           B. watch             C. stage           D. miss

24. Difficulty can help you ______ experience, and experience can, in return, enrich your mind.

   A. accompany        B. accumulate      C. access          D. acknowledge

25. Our next stop will be Canada and then we will ______ our tour in America.

   A. pick up           B. set up          C. look up         D. end up

26. We know that a cat, whose eyes can ______ many more rays than our eyes, can see clearly in the night.

   A. take in           B. call in         C. give in         D. break in

27. To cover my nervousness I started eating an apple, because I think if they hear you chewing on the other end of the line, it makes me sound ______.

   A. absurd           B. casual           C. noble           D. serious

28. We are collecting for the victims of the earthquake-stricken area, please give ______.

   A. automatically     B. simply          C. actually        D. generously