21. The film was ____ success. I was deeply absorbed until it came to ____ end.
A. a; an B. a; the C. the; an D. /; an
22.John treated me to dinner that night, _____was beyond my expectations.
A.that B.which C.what D.it
23. What made her very sad was that her favorite glasses fell off the computer desk, _____.
A.broke B. breaking C. broken D.breaks