I FELT THAT IT HAD BEEN A MISTAKE TO WRITE TO HIM.A. I REGRETTED H...
76. I felt that it had been a mistake to write to him.
a. I regretted having written to him.
b. There was a mistake in the letter I wrote to him.
c. I felt like making a mistake to write to him.
d. I made a few mistakes when I wrote to him.