[micaelo]

Ok, in this exercise I need to rephrase the following sentence into another one including the word "remember":
"I'm sure we studied this unit last year."
Obviously, the most natural sounding answer would be "I remember studying this unit last year". I was just wondering whether "I remember that we studied this unit last year" could also be a correct option. Thank you.

[EngliPatrick]

Both are correct, but I believe the second sentence would be better if the word 'that' was removed:

"I remember we studied this unit last year."