Why might common sawdust be dangerous? because arsenic compounds are widely used in wood preservatives because sawdust can be inhaled because sawdust contains harmful germs because sawdust might cause allergies

Which sentence is correctly punctuated? a. i haven’t found a new job, and i don’t plan to look for one until i have to. b. my work is piling up—day to day—and i can’t seem to get caught up. c. i know things could be worse (they have been in the past).