课文难句的理解与翻译 — 英语词汇题

根据句意及中文提示补全句子：1. He finally s________（成功）in solving the problem after several tries. 2. Please read the text c________（仔细地）and understand every sentence. 3. The teacher asked us to t________（翻译）the difficult sentence into Chinese. 4. Without your help, I couldn't have made such great p________（进步）.