[Q]: How does the sentence end?

It was important to prepare for the Chemistry exam as it was tough but the Biology was easy so Paul only prepared for the

[A]: tough exam.

[Q]: How does the sentence end?

Megan had much thicker skin than Rebecca so

[A]: Rebecca was saddened by people's vile insults.

[Q]: How does the sentence end?

The procedure was more dangerous than the surgery, because the

[A]:
surgery would be very short.