He had planned to make a compromise, but ______ he changed his mind at the last minute.

---- Have you finished your experiment report, Jane?----- Oh, my God. I’ve _______ forgotten all about that.

We suddenly saw the bus about to leave and had to run _____ to catch it.

In the good care of the nurses, the boy is ____ recovering from his heart operation.

Make sure to turn off the gas after you take a bath, which would ___ cause danger.