21. In many countries, ________ good education is regarded as __________ ticket to success in the future.
A. /; / B. a; a C. the ; the D. the; a
22. ________ every day, the information on the Internet is always new and up-to-date.
A. Updated B. Updating C. To update D. Having updated
23. _________, the new student walked towards the teacher’s desk to make her daily report.
A. Nervously and embarrassed B. Nervous and embarrassing
C. Nervously and embarrassing D. Nervous and embarrassed
