—May I speak to Wang Hong?
—Sorry, she is not at home. She ________ to Beijing.
has been
has to go
has gone
I want to provide you _______ food and clothes.
Miss Green has _______ free time than Mr Green. She is busy all day.
I think this is ______ useful book.
______useful advice we had in the meeting last week!
_______animals are in danger and there will be _______space for them if we do nothing for them.