21. Liu Xiang's Olympic dreams were shattered(破灭) 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. His letter was so confusing that I could hardly make any ______ of it.
A. explanation B. sense C. meaning D. guess
