Problem: How does the sentence end?

The case James used to carry the file still got more space in it. I wonder why he chose the 
OPTIONS:
- case that is big.
- file that is big.
Answer: case that is big.

Problem: How does the sentence end?

Since she was on a diet, the woman ate the salad with no dressing since the 
OPTIONS:
- salad was high in calories.
- dressing was high in calories.
Answer: dressing was high in calories.

Problem: How does the sentence end?

Matthew was much warmer than Derrick although 
OPTIONS:
- Matthew was wearing many more layers of clothing.
- Derrick was wearing many more layers of clothing.
Answer: Derrick was wearing many more layers of clothing.

Problem: How does the sentence end?

Megan recently gave Patricia a ride to the hospital, because 
OPTIONS:
- Megan never had a driver's license.
- Patricia never had a driver's license.
Answer:
Patricia never had a driver's license.