171. cure sb. of+某种疾病治好某人的疾病
172.a danger to对…的危险;
be in danger(of)处于…危险中; be out of danger脱离危险
173. to date(=so far， until now)到目前为止
174. out of date过时的;up to date新式的，时兴的;
date back to可追溯到; date from从某时期开始(有)
175. deal with (=concern)论及
176. be in debt to sb.欠…的债
177. on the decline在衰退中，在减少中
in decline下降; on the increase在增加
178. to one's delight令某人感到高兴;
to one’s regret遗憾; sorrow悲痛; relief安心; distress苦恼; shame羞愧; surprise惊奇; astonishment惊奇;
179. delight in(=take great pleasure in doing sth.)喜欢，取乐
180. take (a) delight in喜欢干…，以…为乐
