He _______ have completed his work;otherwise, he wouldn’t be enjoying himself by the seaside.
Mr. Keller _________ forty cigarettes a day until he gave it up.
—Excuse me, can you spare me a few minutes? —_________?
Those farmers who _________ move from place to place with their animals in the past have moved into new houses at last.
_________either the twins or John going with me when the play _________here?
The man had expected to see all his relatives when in hospital, but _________ came to see him while many of his friends offered him their help.