(2013·湖南高考)He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.

—Would you like some______?—Thank you, but l don’t like it.

We ________the difficulty together, but why didn’t you tell me?

If you often go to a gallery, it ______ well change forever the way you look at art.

Mr Black   be at home because she called me from England just now.