Look! The light in Mr. Brown’s office is still on. He ___________ be working there.—It ___________ be him. He has gone to America.

How often does the boy go to see his granny— .

Alex, did you find the old house that you used to live in— Yes, but with much difficulty, for my hometown has _____ changed over these years.

_, I think, and the problem could be settled,

____ you got to know my telephone number? —Through a friend of yours.