.2018一模让我大吃一惊的是他的态度转变得如此之快。（sudden）除非你在一周内给我满意的答复，否则我将诉诸法律。（Unless）出国留学有助于学生学习外语和了解外国文化，但学生应该考虑可能遇到的困难。(consideration)研究表明, 当人们有压力时, 看看有趣的电影或向朋友倾诉是排遣恐惧和忧伤的有效方法。（get）What surprised me most is/was his sudden change of attitude/the sudden change of his attitude.His sudden change of attitude surprised me a lot/most.73. Unless I receive a satisfactory response/reply from you in/within a month, I shall/will/am going to submit this case to the court/sue you in a law court/go to cour
