21. From serious look on her face, we can see that she has brought us word of great importance.
A. the; the B. the; a C. a; the D. the; /
22. Leaving school does not mean that study is finished. Learning can become a way of life and help you achieve the greatest .
A. trial B. competition C. potential D. signal
23. The clerk’s best-known work that is all praises can be seen in the public library.
A. beyond B. within C. with D. without
