| 1 | Only those with inferior ability can always be at their best. | |
| 2 | The productive writer cannot produce any more works now. | |
| 3 | The write's recent book shows that he is at the end of his tether. | |
| 4 | She had been at her wit's end trying to think up an idea for her composition assignment. | |
| 5 | No wonder people are wondering whether Zhang Yimou is too spent after the Olympic Ceremony. |