21. Liu Xiang's Olympic dreams were shattered for ______second time when he unfortunately crashed at ______ first barrier in the 110m hurdles heats in London.
A. the; the B. a; a C. a; the D. the; a
22. She said the pleasure she had harvested in devoting herself to teaching children in this remote village was different from ____ of any other kind .
A. one B. that C. the one D. those
