他没有充分的理由拒绝我们的提议。

He had no valid ___grounds to reject our proposal.

这家酒店的庭院里种满了美丽的花草。

The hotel's ___grounds are filled with beautiful flowers and plants.

他以健康为由申请了休假。

He applied for leave on ___grounds of health concerns.

咖啡壶底部的咖啡渣需要清理掉。

You need to clean the ___grounds at the bottom of the coffee pot.