用所给短语完成句子（共10小题；每小题1分，满分10分） 小题1:I came back _________________ the rain. 小题2:How many people are living in this house__________________? 小题3:You can not imagine what I am ___________________. 小题4:Then they began _________________ experiments. 小题5:Everybody was going about their business _________________. 小题6:He's been working without a rest _________________ breakfast. 小题7:He said he had left the door open __________________. 小题8:Under no conditions should we_________________. 小题9:Peace _______________ seemed an impossible dream. 小题10:We study hard _______________ make our dreams true.