he is determined to run a business, no one can persuade him to .
A. If; give away
B. Although; give in
C. Once: give up
D. As long as; give out
网友回答
A. If; give away
B. Although; give in
(答案→)C. Once: give up
D. As long as; give out
解析：考查连词辨析和固定词组。If如果；although尽管；once一旦；as long as只要；give away赠送，泄漏，出卖；give in屈服；give up放弃；give out分发，筋疲力尽；句意：一旦他决定做生意，没有人能说服他放弃。根据句意说明C正确。