Story needs to be completed:
Dennis was good at multiplying while Nelson was bad at math, so

My choice:
Nelson dreaded going to math classes.

Story needs to be completed:
Kenneth asked Brett to crack his back for him, because

My choice:
Brett was good at relieving pain.

Story needs to be completed:
James could not get enough juice from the pineapple to fill the cup because the

My choice:
cup is big.

Story needs to be completed:
James will be needing two envelopes for the letter he wrote because the

My choice:
envelope is small.