6 Sam with his brothers, (argue/often) It......... ................... about the computer games, (be/usually)

To fill in the blanks in your sentence, you would use the correct forms of the verbs given in parentheses to describe an ongoing action:

"Sam, with his brothers, often argues about the computer games; it usually is a heated discussion."

So the complete sentence would be:

"Sam, with his brothers, often argues about the computer games; it usually is a heated discussion."

Let me know if you need further assistance!