177.　 day by day 一天天地，逐日

176.　 day after day 日复一日地，天天

175.　 cut down 砍倒，切断

　　　　　　　　 D

174.　 consider doing sth.考虑做某事

173.　 concentrate on sth. 全神贯注

172.　 come up with 提出

171.　 come up 过来

170.　 come to oneself 苏醒，恢复知觉

169.　 come to 变成

168.　 come over(to) 过来，顺便来访