1.uptight

Penny never got uptight about exams.

2.pep

Many say that, given a choice, they would opt for a holiday to put the pep back in their lives.

3.rue

Tavare was probably ruing his decision.

4.Boomerang

Boomeranging is a dangerous game.

summary:

Before the Quidditch match between Gryffindor and Slytherin started, Woods had done his pep speech to the members of Gryffindor's team, especially to Harry. Something strange happened during the match. The Bludger always flew to Harry even George hit it as heavy as possible every time.