Question:
To save the world, Liu Kang must defeat Shang Hai in mortal combat, since he would be able to invade the world if he is not defeated.

he
Answer:
Shang Hai
Question:
The NBA will most likely have a lockout this year due to players rejecting their latest compromise, but they refuse to write up a new compromise with them.

they
Answer:
The NBA
Question:
The police tried to blockade the bridge to prevent the criminals from escaping because they needed to pass this route to gain freedom.

they
Answer:
the criminals
Question:
Dan modified Harry's car because he asked politely.

he
Answer:
Harry