Cambridge has provided a handbook for teachers which includes a complete practice test with answers. The audio files for the listening are on the same page.
Download a full test here
https://www.teachers.cambridgeesol.org/ts/exams/generalenglish/fce
Click on the “Cambridge English: First (FCE) Handbook” link, you can find it about 50% down the page. The practice test is in the different sections of the handbook, it is listed in the table of contents as Sample Papers. You can find the audio files for the listening test below the link to the handbook. Good luck!