Fill in the blanks, each using one of the given words or phrases

Fill in the blanks, each using one of the given words or phrases below in its proper form.
stem from   in addition   at random   pile of  in contrast   bump into   in the event of   in all probability   bear out   within reach of／one’s reach   be associated with   take one’s place
The lottery numbers are chosen_______________.
【正确答案】：at random