我的作业明天要交。

My assignment is ___due tomorrow.

图书馆的书明天到期必须归还。

The library books are ___due back tomorrow.

经过多年的努力，他终于得到了应有的回报。

After years of hard work, he finally received his ___due reward.

飞机正朝正北方向飞行。

The plane is flying ___due north.