The chair was dirtier than the sofa because the cat sat on the
OPTIONS:
- chair all day.
- sofa all day.
chair all day.

I spent more time typing my report than I did typing the article because the
OPTIONS:
- report was longer.
- article was longer.
report was longer.

Christine was having trouble opening their computer downloads and asked Rebecca for help because
OPTIONS:
- Christine couldn't figure it out.
- Rebecca couldn't figure it out.
Christine couldn't figure it out.