4. According to Peter, what is the problem with the building?

A. The air-conditioning is too strong.

B. The air-conditioning is out of order.

C. The air-conditioning stops working sometimes.

5. Why did Peter miss the breakfast yesterday morning?

A. He overslept.

B. He couldn't fall asleep the night before.

C. He talked with his roommates late into the night.

6. How many students will be staying in this room?

A. Two.

B. Three.

C. Four.