This is an illness that may result in total blindness if .
—I hear you __________ in a pub. What's it like? —Well, it's very hard work and I'm always tired, but I don't mind.
We won't go sightseeing if __________ tomorrow.
I will write to you as soon as I __________ there.
We will be losing money this year unless that new economic plan of yours __________ well.
"Life is like walking in the snow," Granny used to say, "because every step __________."