她问了一些得体的问题。

She asked a few ___tactful questions.

我的同学马丁非常得体，但他有很强的幽默感。

My classmate Martin is very ___tactful but he has a great sense of humour.

他做了一个得体的评论以避免冒犯任何人。

He made a ___tactful comment to avoid offending anyone.