Neil was more of a supportive friend than Lawrence because 
OPTIONS:
- Neil liked to listen to problems.
- Lawrence liked to listen to problems.
Neil liked to listen to problems.

I always did well in that topic, but I alway struggled in the other subject, because the 
OPTIONS:
- topic was a lot easier.
- subject was a lot easier.
topic was a lot easier.

Christine was happy to walk ten miles a day but Lindsey was not because 
OPTIONS:
- Christine was very fit.
- Lindsey was very fit.
Christine was very fit.