The correct sentence is "We have been testing the video system since last week.", using the present perfect continuous to indicate an action that started in the past and continues to the present.
La frase correcta es "We have been testing the video system since last week.", usando el presente perfecto continuo para indicar una acción que comenzó en el pasado y continúa hasta el presente.
| Question | We … the video system since last week. |
|---|---|
| Title | 2375 |
| QType (0=kprim,1=mc,2=sc) | 2 |
| Q_1 | have been testing |
| Q_2 | had been testing |
| Q_3 | would be testing |
| Answers | 1 0 0 |
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