4. A. Yes, I have.            B. Yes, I will.              C. Yes, I am.

3. A. At the post office.       B. In a shop.               C. In a restaurant.

2. A. 4.                    B. 12.                     C. 52.

1. A. It's 11 : 28.             B. It's Monday.             C. It's April 22th.