Tom, clean up the broken glass _________ someone walks on it.
He likes to help others ________ he is very busy.
Have you seen Jack recently? I wonder ______ with his classmates.
.Ten minutes later,a bus ______ and everybody got on it.
How I was _______when I heard the _______ news!
The number of people in the party _____fifty, but a number of them ____ absent for different reasons.