I also agree with "C". I think "C" is the best choice. I'm not sure of B but it doesn't sound really good.
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I also agree with "C". I think "C" is the best choice.
I'm not sure of B but it doesn't sound really good. To me, no reason to use a passive voice here. I don't think it really fits the meaning of the original sentence "I had the habit of....etc."
When you say " I used to do something" This term originally is in the past. When you say "I was used to..." I feel it's over. But don'