—I phoned you at 9 this morning but got no answer.—I am sorry. I _____ the bell. I _____ in the garden.
About _________of the workers in that steel works are young people.
The workers can complete the new bridge in_________ .
It took me_________days to finish drawing a beautiful horse.
There were_________the students in our class who are from the north.
To plant a tree,we must dig_________ .