Someone might find out, and that would never do.
也许有人会发现，那是绝对不行的`。
Someone has made an attempt on the President's life.
有人企图刺杀总统。
He could hear someone moving around in the room above.
他能听到楼上屋里有人走动。
I'll put you in touch with someone in your area.
我将安排你和你那个地区的一个人进行联系。
Someone has mixed up all the application forms.
有人把申请表都弄乱了。