21. The party last night was_______ great success. We sang and danced until it came to _______ end at 12.
A. the; the B. \; an C. a; an D. a; the
【解析】选C。考查冠词。success作“成功的人或事”时为可数名词，故第一空需加“a”; come to an end结束，完毕，固定短语，故选C项。
22. Tom worked hard, and finally his ideal _______ a scientist _______ .
A. of being; was come true B. of being; came true
C. to be; come true D. to be; was come true
【解析】选B。ideal of（doing）sth. ，故排除C、D两项；come true不用于被动语态，故选B项。
