QUES: Continue writing.

Joseph had his shoelaces tied every day by Dennis because
+++++++++
ANS: Joseph wasn't good at it.

QUES: Continue writing.

Jennifer was more comfortable selling vacuums door-to-door than Carrie because
+++++++++
ANS: Carrie had never worked in sales before.

QUES: Continue writing.

Natalie was being cold to Katrina because
+++++++++
ANS: Katrina broke her gold necklace that had sentimental value.

QUES: Continue writing.

William held Derrick's hand as they got their blood drawn for tests, because
+++++++++
ANS:
Derrick was afraid.