She studies for an English test by_______the textbook.
English is ______ used than Chinese in the world.
His father looks young, but in fact he is ______.
He asks me ______ to use the computer.
He’s already ridden the horse before ,______?
She ______ for ten hours at least. It was at nine that she fell asleep last night.A slept B had slept C has slept D was sleeping