| 1. | Oh, it must have been that other chap .
啊，很可能是另外一个小伙子。 |
| 2. | It must have been a valuable experience .
那准是有价值的所见所闻了。 |
| 3. | I must have been a trial to them too .
我那时也一定是他们的一块病。 |
| 4. | The theft must have been an inside job .
这一窃案一定是内部人干的。 |
| 5. | What a blank, dreary mind he must have !
他的思想一定是多么空虚乏味！ |
| 6. | I must have known that you would take him .
大概我早就知道你吞噬了他。 |
| 7. | Radiation must have exactly the frequency .
辐射必须严格具有频率。 |
| 8. | She must have been at work from her cradle .
她一定是很小就做工。 |
| 9. | Some of these droughts must have been severe .
有一些旱灾想必是严重的。 |
| 10. | He must have smelt the smell of jack .
他一定闻出了杰克的味儿了。 |
