26. —Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
It’s easy to _________ this camera , while putting the pieces together is quite difficult, so you must keep the directions well.
---- I want to give this watch to David. ---- What ? Don’t you know it _________ Henry ?
---- What do you think of the book ? ---- Oh excellent. It’s worth _________ a second time.
I felt bad _________ I talked about my unlucky experience to the public.
Do you know why Nelson Mandela _________ violence to make black and white people equal?