如果你现在离开课程，你所有的努力都将付诸东流。

If you leave the course now, all your hard work will go ___down ___the ___drain.

我认为所有那些晚间谈话和10万日元的投资都打水漂了。

All those evening conversations and the investment of 100,000 yen went ___down ___the ___drain, I thought.

由于管理不善，政府为该倡议提供的资金已付诸东流。

The government's funding for the initiative has gone ___down ___the ___drain due to mismanagement.