---Will you stay at home until your sister comes back? ---Sorry, I _______. I have a meeting and have to go in ten minutes.
Some ______are ______their time to help the poor in underdeveloped countries.
We need to _______a plan for the coming party.
Could you help _______ the classroom? It’s dirty.
I want to _______ kids_______ their school work.
Our teachers often tell us not _______ the street when the traffic light is red.