| 1 | We need a signal to say, "This is an important memory." | |
| 2 | Nazi officials recruited so-called educated dogs from all over Germany and trained them to tap out signals using their paws. | |
| 3 | Although the students were led to believe there was no way they could get caught cheating, a system was in place to catch those who had. | |
| 4 | Making mental notes of these occasions and then writing them down in a special notebook can make the difference between a future present well-received and one politely accepted. |