—Do you know whose dictionary it is?—It ________ be Ann’s. Look! Her name is on the first page.

---Mum, I’m stressed out.--- I think you ____ listen to some music..

Days later, my brother called to say he was all right, but ________ say where he was. 

--- My son is _____ to be seen. Where has he gone? --- I think he _____ in the building. 

This printer is of good quality. If it ________ break down within the first year, we would repair it at our expense.