—What will Jack do on vacation? — He’ll go to Disneyland if he _________ enough time.
---It’s a secret between us. Don’t tell anybody. ---Sure, ______________.
It’s quite hot in the room. You’d better the windows or the door.
If my parents ______ free tomorrow, we _____ to visit my grandparents.
There are _________women doctors in the hospital.
This is ________ article written in English. I think English is ______ useful language.