21. Going to _____ British high school for one year was ______enjoyable and exciting
experience for me.
A. an; an B. a; an C. a; a D. /; an
22. As a new boss in the company, Mr Zhang has to ______ the respect of her workers.
A. show B. fell C. earn D. find
23. He made up his mind to devote his life to ____ pollution from _____ again.
A. preventing; happening B. prevent; happen
C. preventing; happens D. preventing; will happen
