--- ________ of them knows the answer. What can we do now? --- Let’s ask a third boy for help.
If the homework _______, you can go home.
He is one of the students who, I am sure, always do ____ best.
Don’t be angry with him. _______, he is a kid.
The number of people invited ____fifty, but a number of them _____absent for different reasons.
---Would you mind taking care of my pet dog while I’m away? ---______.