a) 1. That's the school which has a swimming.
2.That's the work that sounds strange.
3.That's the teacher who's going to give a test.
4.That's the stop that sells English books .
5.That's the actress who won the prize.
b) 1.That's the film I want to see.
2.That's the word I don't understand.
3.That's the mistake I made.
4.That's the music I love.
5.That's the girl I met two days ago.