We apologize for the inconvenience caused, as per the description above, you are not able to print your PDF file in black, as it's printing only in Green color, Is that correct?
Try printing the PDF using Print in Grayscale (Black and White) in the Print dialog box in Reader/Acrobat. You can also try printing as an Image in Advances Print settings, you can also refer to Print PDF as image | Adobe Acrobat, Reader
You can also refer and try the solutions from the following Adobe article and discussions Print in black and white using Acrobat or Reader
Refer to the answer marked as correct in the following discussion Cannot print to PDF in black and white
Are you using Acrobat or the freeware Adobe Reader to print the PDF? Have you tried printing any other PDF file?
What is the dot version of Acrobat/Reader installed? To identify refer to Identify the product and its version for Acrobat and Reader DC
What is the make and model of the printer installed? Make sure you have the latest printer drivers installed.
Let us know how it goes and share your findings.