Problem: How does the sentence end?

Tooth decay was a problem for Rebecca but not Erin, since
Answer: Rebecca neglected her teeth.

Problem: How does the sentence end?

Controlling the remote control car was within Mike's capabilities, but he can't pilot the toy plane. The
Answer: remote control car is easier to maneuver.

Problem: How does the sentence end?

Mary had to clean their house more often than Sarah did because
Answer: Mary had a cat in their house.

Problem: How does the sentence end?

Jason trusted Randy was mixing the ingredients correctly because only
Answer:
Randy had read the instructions.