QUES: Continue writing.

The teeth of Erin were a lot dirtier than Betty's teeth, due to
+++++++++
ANS: Erin being unhygienic.

QUES: Continue writing.

Stefan bought a measuring tape instead of the weighing scale because it's much more imprecise to use the
+++++++++
ANS: scale to track your weight training physical transformation.

QUES: Continue writing.

Justin loaned a blue pen to Ian, as
+++++++++
ANS: Justin brought extra writing instruments to class that day.

QUES: Continue writing.

Jennifer learned to read before they were four but Amy did not until they were ten because
+++++++++
ANS:
Jennifer was very quick.