5. Students must learn to abide ......... the rules and regulations of the school. (a)in (b)with (c)by (d)for 6. I would have told you the answer if I the answer if I ........ it. (a)know (b)knew (c)had known (d)knowing 7. David, I use your pen, please? (a)will (b)can (c)must (d)should​