work through, address, grapple with, deal with

subject / homework exercise / task, problem

important; urgent; pressing

importance; urgency

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

today, this day / nowadays

(informal) no problem

unthinkable, out of the question

practical question (problem)

matter of life or death / (idiomatic) an extremely urgent matter