他礼貌地询问是否可以借用我的钢笔。

He ___politely asked if he could borrow my pen.

他礼貌地询问是否可以提前离开会议。

He ___politely asked if he could leave the meeting early.

她礼貌地拒绝了邀请，以免伤害对方的感情。

She ___politely declined the invitation to avoid hurting their feelings.