QUES: Continue writing.

Mary was better at cutting trees than Erin was, so
+++++++++
ANS: Erin declined the lumberjack job.

QUES: Continue writing.

Donald was very good at playing the violin but Matthew was not.
+++++++++
ANS: Matthew gave a lousy concert performance.

QUES: Continue writing.

Dennis was studying constantly for the test while William procrastinated, so
+++++++++
ANS: William did very poorly on the test.

QUES: Continue writing.

Developing a new product for the mass market is customary for Kevin but not Leslie because
+++++++++
ANS:
Kevin is gifted.