| 1. | He worried over it for a week .
他为了这件事苦恼了足足一个星期之久。 |
| 2. | For two years the capital was in constant danger .
首都不断受威胁达两年之久。 |
| 3. | This city was besieged by the enemy for two years .
这城为敌人围困达二年之久。 |
| 4. | He had disappeared for three weeks after that .
这之后，他消声匿迹有三星期之久。 |
| 5. | He stood for an hour, powerless to turn away .
他站在那里达一小时之久，无法离开。 |
| 6. | We shared a sitting-room for fifteen months .
我们共用一个起居室，达十五个月之久。 |
| 7. | He has been engaged 10 years on the dictionary .
他从事这本词典的编纂工作已达10年之久。 |
| 8. | Six men have been trapped in a mine for seventeen hours .
六个人困在矿井里已达十七个小时之久。 |
| 9. | For perhaps five seconds, exaltation made him careless .
大概有五秒钟之久，他兴高采烈得忘乎所以。 |
| 10. | For a minute they remained staring blankly at one another .
他们俩毫无表情地面对面瞧了一分钟之久。 |
