20. My grandma still treats me like a child. She can’t imagine ______ grown up.

　 A. my　　　　　　　　　 B. mine　　　　　　　 C. myself　　　　　 D. me

19. Although he likes playing tennis, he is ________ but a good tennis player.　

　 A.anything　　　　　　 B.something　　　　　 C.nothing　　　　　 D.everything

18. Finding information in today’s world is easy. The _______ is how you can tell if the information you get is useful or not.

　 A. ability　　　　　　　 B. competition　　　　 C. challenge　　　　 D. knowledge

17. You can come to my accommodation whenever _____.

　 A. you are convenient　　　　　 B. you will be convenient

　 C. it is convenient to you　　　　 D. it will be convenient