单选题 You know yourself better than anyone else. Do not undertake that project unless you can ______ it.

【正确答案】 C

【答案解析】[解析] 各项的意思是：complement“补足，补充”；compliment“赞美”；implement“使生效，贯彻，执行”；supplement“增补”。根据句意判断，答案是C。