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When do you say this?

I say "I could eat a horse" when I am ..........
I say "I haven't a clue" when I ..........
I say "I've got to go now" when I am ..........
I say "My feet are killing me" when I have ..........
I say "You can count on me" when I ..........
I say "They lost" when I tell someone the ..........
I say "I haven't a minute to spare" when I ..........