Does Amy ________ after school?
On the way to the post office, I heard some children ________the English song.
The train ________ here at 6 o’clock.
There will be ________water and ________trees in 100 years, how can we live?
Children are always ________ in ________stories.
There are about five _______ young trees on the hill.A. hundred B, hundreds C. hundred of D. hundreds of