One day we will manage to _____the world ______this terrible disease.
Occasions are quite rare _____ I have the time to stay with my kids.
I found him _____ on his back _____ upward.
We didn’t know you were in trouble at that time, _____ we would have lent you the money.
I’ve finished much of the work. Could you please finish ______ in two days?
There was a terrible noise _____ the sudden burst of light.