There are five circles with different colours on the flag of Olympic Games. They are green, blue, red and .
I wonder __________.
— Michael Jackson was called the king of pop, wasn’t he? — Of course. He by people all over the world.
Leo was late for class. So he _______ clean the classroom after school.
People under 18 should _______ to go to an Internet bar.
---Where is Tom? ---I’m not sure. He _________ football on the playground.