When Michael Phelps won another gold medal at the National Aquatics Center, _____ was likely that his dream of getting 8 gold medals at the Beijing Olympic Games was to be realized.[ ]

Liu Yang is the first Chinese woman astronaut ______ has ever traveled in space.

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

When her husband died， she lived ______. Her lovely pet dog made her feel less _______.

What happened My mum’s room is empty. All her things are gone! —Oh, very sorry, sir. We thought she ____________ the hotel this afternoon, so we took her bags downstairs.