值得赞扬的是，约翰立即为错误道歉。

___To ___his ___credit, John immediately apologized for the error.

值得赞扬的是，项目按时完成了。

The project was completed on time, ___to ___her ___credit.

值得赞扬的是，志愿者们留下来清理到很晚。

___To ___their ___credit, the volunteers stayed late to clean up.