—Whose English book is this?
—It _______ be Lily’s, but I’m not sure.
might
can’t
must
Anny wants a room ________ his own. A.of C.on C.for D.to
He expects ________ to Tibet for traveling.
Jim is so clever that he can do everything ________.
They are having a meeting in the next room, so we must do everything ________.
He learned hard ________ he could go to a good university.