21. ---- Did you have ________ fun at the party?
---- Yes. It’s ________ shame that you missed it.
A. a; a B. /; / C. /; a D. a; /
22. We don’t doubt ________ the boy can ________ the angry teacher.
A. if; apologize for B. whether; apologize to
C. that; apologize to D. what; apologize
