sentence: Though they had been hanging out together, Derrick came down with a fever while Samuel didn't. OPTIONS:
- Derrick always had a strong immune system.
- Samuel always had a strong immune system.
complete: Samuel always had a strong immune system.

sentence: Because Elena was dissatisfied with the service at the restaurant while Betty was happy, OPTIONS:
- Elena left a large tip.
- Betty left a large tip.
complete: Betty left a large tip.

sentence: Paul set up the microscope and the hand lens for students to view the microorganisms, but the OPTIONS:
- lens was the only one powerful enough.
- microscope was the only one powerful enough.
complete:
microscope was the only one powerful enough.