31． The World Expo is coming． My cousin in Shanghai _______ as a volunteer in 2010．

A． has been working 　　　　　　　　　　　　　　　　　　 B． has worked

C． works　 　　　　　　　　　　　　　　　　　　　　　　　　　 D． is going to work

30． -Why don’t you ______ to a more effective method to learn English?

-Well, I am thinking about it．

　　　 A． switch on　　　　　　　 B． switch over　　　　　 C． switch off　　　　　　 D．switch through

29． Lack of social communicative abilities, Gary is going to have problems finding a job ________ he gets his A levels．

　 　 A． when　　　 　　　　 B． even if　 　　　　　　 C． because　　　 　　　 D． until

28． When the spaceship separated from the rocket, he suddenly got _______ feeling of soaring into _______ space because of the zero gravity．

　　　 A． the; the　　　　　　　　 B． a; a　　　　　　　　　　　 C． a; /　　　　　　　　　　　 D．/; a

27． All the preparations for the eco-travel _______, and we’re ready to start．

A． have been completed　　 　　　　　　　　　　　　 B． complete

C． are completing　　　　　　　　　　　　　　　　　　　　　 D． is completed

26． We should fight _______ our own weak points _______ a bright future．

A． against; for 　 　　　 B． for; with 　　 　　　 C． against; against 　　 D． for; against