sentence: He tried to put the pacifier into their baby's mouth, but struggled because the  OPTIONS:
- pacifier was too tiny.
- mouth was too tiny.
complete: mouth was too tiny.

sentence: The paragraphs on computers were harder to write than the ones on sports because we had to research the  OPTIONS:
- computers .
- sports .
complete: computers .

sentence: Erin needs parental supervision to do the experiment, but not Maria because  OPTIONS:
- Erin is an adult.
- Maria is an adult.
complete:
Maria is an adult.