Ⅱ.从方框中选择适当的连词完成句子,每词或短语限用一次。until,because,while,so,when,before,since,after,if,so that1.We're going to tidy upaftereveryone isgone,2.Let's buy some bookss whilethey're still onsale.3 Tony was still half asleep whenhe arrived atwork.4.He hasn't played baseballsincehe left highschool.5.I have already had breakfast,SOI'm nothungry.