QUES: Continue writing.

Christopher knew a lot about electricity but Leslie did not since
+++++++++
ANS: Christopher studied electrical engineering in college.

QUES: Continue writing.

The flood overran the town but did not hurt the camp, since the
+++++++++
ANS: town was surprised by the sudden rain.

QUES: Continue writing.

Leslie is being showed how to use Firefox by Jeffrey.
+++++++++
ANS: Leslie is likely more incompetent at technological things.

QUES: Continue writing.

Since Kayla had an interest in biotechnology, her school counselor Emily recommended she major in biology in college.
+++++++++
ANS:
Emily recommended several colleges with good biology programs.