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.

管线竣工测量所使用支导线长度在l／500地形图地区应不大于（）

A、250m

B、500m

C、1000m