Last Monday the teachers and students held a grand ceremony __________ the 80th anniversary of our school.
—I’m sorry I stepped on your foot; it was an accident. —It wasn’t! You did it purpose.
Forgive him, please. I don’t think he broke your rule .
—Why is he absent today? —It is he is sick.
They asked questions before the new teacher started class.
Why don’t you _____ your ideas on paper?