Bill is at home watching TV. His sister is in her bedroom doing her homework. His brother is in the bathroom washing his face. At six o’clock, the doorbell rings. Bill runs down the stairs and answers the door. It is his friend Mark. “Where is Tony?” asks Bill. “He is sick,” replies Mark. “His mother said he cannot go to the park with us. Are you ready? Don’t forget your hat, scarf, and gloves because it is very cold today.”