QUES: Continue writing.

Elena passed the exam while Laura failed because
+++++++++
ANS: Laura didn't study hard for the exam leading up to it.

QUES: Continue writing.

The customer wanted to buy the cardigan but settled on the belt because the
+++++++++
ANS: belt was cheap.

QUES: Continue writing.

The apples in the store looked duller than the tomatoes because the
+++++++++
ANS: tomatoes were much fresher.

QUES: Continue writing.

Isn't it wiser to buy a reusable filter than a disposable filter? I think the
+++++++++
ANS:
reusable filter is cheaper in the long run.