Mary _______ be in the hospital. I saw her play basketball a minute ago.

—Are you going to the concert?—I’m not sure. I     stay inside and watch it live on TV instead.

May I ask you ________ questions?

--- Where are we to hold the conversation? --- We’ll go to a quiet place and no one _____ disturb us.

That man ________ be Mary’s father, as he is much taller.