He hurried to the airport with his friends only ______ that all the film stars they liked best had been picked up by their company.
Save water as ___ as we can.
--What’s the time ___ your watch?---On, my watch ___ “A quarter to five”
--____ did he send this letter to you? ---By mail
--Let’s go to see our teacher. ---_____.
--Have you handed in your composition? ---____.