Don’t get off the bus ____ it stops.
That’s very kind _______ you, but I think I can manage it myself.
He is ill. I don’t know _______ he will come to school.
Li Ming will take part in the boys’ _______.
Would you please _______ so much noise?—Oh, sorry, I won’t.
—I’m sorry I broke your pen. Let me buy you a new one. — .I have another one.