This flashcard tests the correct modal verb phrase ('must have been') to express a logical conclusion about past events.
Esta teoria assume que devem ter havido mudanças climáticas de longo prazo em muitas áreas no passado.
| Question | This theory assumes that there … long-term climatic changes in many areas during the past. |
|---|---|
| Title | 2468 |
| QType (0=kprim,1=mc,2=sc) | 2 |
| Q_1 | must be |
| Q_2 | must have |
| Q_3 | must have been |
| Answers | 0 0 1 |
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