21. ______ 2010 Shanghai World Expo is a perfect opportunity to get ______ panoramic (全景的) view of the whole world without traveling thousands of miles.
A. /; the B. The; the C. The; a D. /; a
22. Susan was expecting her favourite singers, but to her disappointment, _______ appeared.
A. some B. none C. everyone D. no one
23. I feel sure that ______ qualification, ability and experience, you are abundantly suited to the position we have in mind.
A. in defence of B. in spite of C. in terms of D. in favour of
