She had hardly got back to the kitchen ________ the doorbell rang.
Hard _____ he tried, he failed to catch up with the first runner.
--- Are you going to Tom’s birthday party? --- _____. I might have to work.
I _____ through that bitter period without your generous help. A. didn’t go B, hadn’t gone C. wouldn’t go D. couldn’t have gone
--- What do you know about Darwin after he returned from the trip by sea? --- Well, he got married and _____ down to live in Kent.
Tom is _____ to miss the early bus because he got up late.