175.at work忙于工作

174.rushed off one’s feet忙于工作

173.be familiar with 熟悉

172.in disorder混乱

171.without turning a hair毫不畏惧

170.just as 恰如

169.get close to接近…

168.not later than不迟于

167.pull out把…拉上来

166.without a sound悄无声息地