---What do you think of the house?---_____.It is everything we have been looking for.
--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? ---____.
I have been looking for this book for months, and _____ I have found it.