Mr. and Mrs. Cooper are very forgetful (健忘的). For example, Mr. Cooper sometimes goes to his office for work on Sunday morning, for he thinks it is Monday. And Mrs. Cooper sometimes forgets to cook supper for the family.
One summer they planned to fly to New York for their vacation.They got to the airport only ten minutes before the plane took off. So time was short. But suddenly Mrs. Cooper said she must tell Alice, their daughter, not to forget to lock (锁) the front door when she went to school. Because Alice was then at school, they couldn't tell her about it by telephone. So they hurried to the post office. Mrs. Cooper wrote a short note to Alice while Mr. Cooper bought a stamp and an envelope (信封). Soon the note was ready. They put the stamp on the envelope in a hurry and put it in the postbox, but suddenly Mrs. Cooper began to cry. The short note was still in her hand. She put the plane tickets in the envelope!
