In our school library there a number of books and the number of them growing larger and larger.
–Whose shirt is this?--It _______ be Li Lei’s. It is too big for him.
I saw many ____________ eating grass on the hill.
—By the way, have you got ______ e-mail address?—Oh, yes, it is swimonland @ hotmail.com.
This sign means______.
— Would you like me to show you the way? ---_________.