R
180. receive a letter from sb. 收到某人的来信
181. regard...as... 把......看做......
182. remind sb. of sth. 使某人想起某事
183. reply to 回答，答复
184. return sth to... 把某物还给......
185. return to sp. 返回某地
186. ring sb.(up) 给某人打电话
187. run off 跑掉，迅速离开
188. run out of 用完，用尽
189. run after 追赶