The schoolboys and schoolgirls are walking along the street, ______ a small red cap.

You have made a few mistakes in your composition but______, it’s well written[ ]

I’m sorry to have you _____ so long. [ ]

Excuse me, where are we going to have our class meeting—I’m not sure. Ask our monitor, please. He know.

Mistakes don’t just happen；they occur for a reason.Find out the reason，and then making the mistakebecomes________.[ ]