153. Obtain find out/ get/ gain

　　154. obligation duty

　　155. Occupy---take up

　　156. Occur happen

　　157. odds problem

　　158. painstaking effort

　　159. Prefer to do sth/ prefer sth to sth ------ like doing sth better / like sth better

　　160. preserve keep

　　161. Perhaps there is an element of truth in ------ perhaps they are all right in a way

　　162. Place a high value --- praise/speak-- highly

　　163. poverty-stricken area poor area

　　164. predicament hardship

　　165. Promptly --- in time

　　166. prominent --- important

　　167. pursue seek

　　168. Reluctantly --- be unwilling to do / unwillingly

　　169. Refer to sb as sth ---- call sb sth

　　170. Remind sb of ---- make sb remember sth

　　171. renowned famous

　　172. reckless move move on an impulse

　　173. resort to doing adopt/take 采取

　　174. ringleader main course

　　175. ruin damage