—Susan ,where is your mother？— My mother is cooking in the       

— Shall we go out for a walk?— Sorry. This is not the right _______ to invite me. I am too tired to walk.

--- This is Mike Brown.--- Hello,_________.

When I hurriedly got to the airport ,the lady at the window told me that there were no________ left on the plane.

Oh, dear! There isn’t enough _____ for us in the lift. Let’s wait for the next.