买这个地方是个大赌注，但似乎已经成功了。

Buying this place was a big ___gamble, but it seems to have paid off.

沿着走廊疾跑，我冒了个险，冲向领主的办公室，文件很可能在那里。

Racing along the corridor I took a ___gamble and rushed for the lord's office, where the documents were likely to be.

创业总是一场赌博。

Starting a new business is always a ___gamble.