21. When his words came to______ end, he reminded that the accidents were still on______ increase.
A. an; the B. /; / C. the; / D. an; an
【解析】选A。句意：当他的讲话结束时，他提醒说事故仍然在增长。come to an end结束，固定搭配；on the increase“在增长”也是固定搭配。
Our graduation party was______ success. We sang and danced until it came to _______ end at ten o’clock.
［2010保定高二检测］
A. a; the B. a; an C. the; an D. /; /
