The computer would not be put on my old desk because the 
OPTIONS:
- computer wasn't sturdy enough.
- desk wasn't sturdy enough.
desk wasn't sturdy enough.

The seeds were a better deal than the plants, because the 
OPTIONS:
- seeds were on sale.
- plants were on sale.
seeds were on sale.

Betty took a lot of Polaroid pictures on their vacation while Laura took plenty of videos. 
OPTIONS:
- Betty gave their family a photo album of their trip.
- Laura gave their family a photo album of their trip.
Betty gave their family a photo album of their trip.